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    <title>topic Re: Speedlite 600ex-rt battery problem in Speedlite Flashes</title>
    <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/387672#M3607</link>
    <description>&lt;P&gt;Regarding use of Lithium batteries in Canon Speedlite: Here is a Service Notice issued by Canon in 2019:&lt;/P&gt;&lt;P&gt;******************************************************************************************************************************&lt;/P&gt;&lt;P&gt;"Service Notice: Caution Concerning use of Lithium Batteries&lt;/P&gt;&lt;P&gt;Update&lt;/P&gt;&lt;P&gt;Thank you for using Canon products.&lt;/P&gt;&lt;P&gt;Products&lt;/P&gt;&lt;P&gt;Speedlite 220EX&lt;BR /&gt;Speedlite 270EX&lt;BR /&gt;Speedlite 270EX II&lt;BR /&gt;Speedlite 320EX&lt;BR /&gt;Speedlite 380EX&lt;BR /&gt;Speedlite 420EX&lt;BR /&gt;Speedlite 430EX&lt;BR /&gt;Speedlite 430EX II&lt;BR /&gt;Speedlite 540EZ&lt;BR /&gt;Speedlite 550EX&lt;BR /&gt;Speedlite 580EX&lt;BR /&gt;Speedlite 580EX II&lt;BR /&gt;Speedlite 600EX&lt;BR /&gt;Speedlite 600EX-RT&lt;BR /&gt;Macro Ring Lite MR-14EX&lt;BR /&gt;Macro Ring Lite MR-14EX II&lt;BR /&gt;Macro Twin Lite MT-24EX&lt;BR /&gt;Compact Battery Pack CP-E2&lt;BR /&gt;Compact Battery Pack CP-E3&lt;BR /&gt;Compact Battery Pack CP-E4&lt;/P&gt;&lt;P&gt;Details&lt;/P&gt;&lt;P&gt;AA Lithium batteries cannot be used with any Speedlite or Macrolite products and compact battery packs including those listed below because certain AA lithium batteries, in rare cases, may become extremely hot during usage in such products."&lt;/P&gt;&lt;P&gt;*********************************************************************************************************************************&lt;/P&gt;&lt;P&gt;Apparently, Canon Canon doesn't want you to use Lithiums, and I have read independent articles which discuss AA battery types and warn, in greater depth,&amp;nbsp; against using Lithiums in flashes. Here is an excerpt from one:&lt;/P&gt;&lt;P&gt;**********************************************************************************************************************************"Lithium AA batteries Lithium/Iron Disulfide (Li/FeS₂). These 1.5 volts and are&lt;BR /&gt;NOT the same as the Lithium ion batteries used in cameras. These work well, and&lt;BR /&gt;with some advantages, except they are not rechargeable, and will recycle more slowly&lt;BR /&gt;than any of the others. Energizer Ultimate Lithium AA Batteries (8-Pack) can provide&lt;BR /&gt;more flashes than the others. Better life than alkalines at high current loads (flash&lt;BR /&gt;units), and much better performance than any in extreme cold temperatures (to -&lt;BR /&gt;40°C per Energizer data sheet — this is what you want in sub-freezing temperatures).&lt;BR /&gt;Even the weight is lighter. Shelf life is 20 years. A bit more pricey, but better in a few&lt;BR /&gt;ways except for recycle time and heating concerns (and of course replacement&lt;BR /&gt;cost). Recycle time is important for speedlights, but these lithium cells contain&lt;BR /&gt;protection to limit the maximum current for safety reasons (heat).&lt;BR /&gt;Note that this above is now a new improved AA Lithium battery, which limits the&lt;BR /&gt;current less, better and faster recycle. Those I saw recycled faster, at least at same&lt;BR /&gt;speed as alkalines in flashes now. If using a lithium AA, flashes will want the new one&lt;BR /&gt;called Ultimate. But these cells start out at 1.6 volts. Be very aware of heating&lt;BR /&gt;conditions (fast shooting speed makes it worse). In fact, Canon put out an advisory&lt;BR /&gt;stating: Do Not Use AA Lithium Batteries in a Flash.&lt;BR /&gt;If shooting rapid flash shots, the lithiums can get especially hot, especially fast, and&lt;BR /&gt;could damage the flash, and may just quit (thermal fuse). A single flash only every&lt;BR /&gt;now and then is one thing, but any rapid shooting is surely better off with NiMH (but&lt;BR /&gt;rapid is always a concern to a flash). The lithium flash recycle times are longer too,&lt;BR /&gt;which is a biggie when waiting for the next shot. Eneloop NiMH rechargeables remain&lt;BR /&gt;my own choice for my speedlight use.&lt;BR /&gt;The previous data sheet (older battery named "Advanced") previously said they limit&lt;BR /&gt;current to 2 amps for pulse loads, to prevent hazard. The current new L91 data sheet&lt;BR /&gt;(battery named "Ultimate") now says only limited to 2.5 amps continuous, or 4 amps&lt;BR /&gt;maximum peak (2 seconds On, 8 seconds Off), with less internal resistance, and&lt;BR /&gt;seems as fast as Alkaline now, and will last longer than alkaline in flashes. The&lt;BR /&gt;lithium high internal resistance was artificially added as a safety factor. See their&lt;BR /&gt;Application manual page 19-20 for reference of this safety protection (It says L91, but&lt;BR /&gt;both were L91, each in their time. This document dated 2001 is the older version).&lt;BR /&gt;Flash wants the new version called "Ultimate".&lt;BR /&gt;These AA size lithium are NOT rechargeable. Lithium rechargeables are not AA size,&lt;BR /&gt;because lithium rechargeables are about 3.3 volts instead of 1.5 volts for AA (lithium&lt;BR /&gt;ion for cameras and laptops are a different chemistry. 3.6 volts per cell). The big&lt;BR /&gt;point is, lithium rechargables are NOT 1.5 volts. Lithium AA cells are instead Li/FeS2&lt;BR /&gt;chemistry."&lt;BR /&gt;***********************************************************************************************************************************&lt;/P&gt;</description>
    <pubDate>Tue, 27 Sep 2022 04:59:21 GMT</pubDate>
    <dc:creator>normadel</dc:creator>
    <dc:date>2022-09-27T04:59:21Z</dc:date>
    <item>
      <title>Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9779#M1251</link>
      <description>Hi&lt;BR /&gt;&lt;BR /&gt;I have just bought a 600ex-rt ... But the batteries I put in it (which are all new) only result in a "replace battery" sign and the flash refuses to switch on.&lt;BR /&gt;&lt;BR /&gt;I have tried 3 new sets of batteries, all are top grade lithium batteries, is there a known issue with lithium batteries - the manual says they can be used?&lt;BR /&gt;&lt;BR /&gt;Many thanks for any info that could help.&lt;BR /&gt;</description>
      <pubDate>Wed, 02 Jan 2013 20:59:07 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9779#M1251</guid>
      <dc:creator>PhotoSmurf</dc:creator>
      <dc:date>2013-01-02T20:59:07Z</dc:date>
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    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9781#M1252</link>
      <description>Any luck with fresh alkaline? I've only used Eneloop Ni-MH in my 600. Sounds like a defective speedlite.</description>
      <pubDate>Wed, 02 Jan 2013 21:13:19 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9781#M1252</guid>
      <dc:creator>7D5D</dc:creator>
      <dc:date>2013-01-02T21:13:19Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9783#M1253</link>
      <description>Just been out and bought some standard alkaline AA's - same result. Brand new batteries, nothing but the replace battery symbol.&lt;BR /&gt;&lt;BR /&gt;If its defective, does it go back to canon under warranty? Or return to Amazon where I bought it from for replacement?</description>
      <pubDate>Wed, 02 Jan 2013 21:39:18 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9783#M1253</guid>
      <dc:creator>PhotoSmurf</dc:creator>
      <dc:date>2013-01-02T21:39:18Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9787#M1254</link>
      <description>Well, that's an oddity!!!&lt;BR /&gt;&lt;BR /&gt;Put the batteries in and turned it on - nothing. Turned it on and closed battery cover while in the on position - and it's started working fine. Very odd.&lt;BR /&gt;&lt;BR /&gt;Thanks for the replies.</description>
      <pubDate>Wed, 02 Jan 2013 22:06:08 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/9787#M1254</guid>
      <dc:creator>PhotoSmurf</dc:creator>
      <dc:date>2013-01-02T22:06:08Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/18073#M1255</link>
      <description>Thank you for posting this. That fixed it for me. That is a crazy problem and I would like it fixed.</description>
      <pubDate>Wed, 20 Mar 2013 22:24:35 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/18073#M1255</guid>
      <dc:creator>grace_g</dc:creator>
      <dc:date>2013-03-20T22:24:35Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20085#M1256</link>
      <description>&lt;P&gt;just received my new 600-EXRT... directly from canon.&lt;/P&gt;&lt;P&gt;and i get the same problem as you guys had.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;i also though there might be some trick, but closing the battery cover while &amp;nbsp;the flash is on ON with the batteries inside doesn't work.&lt;/P&gt;&lt;P&gt;i get the symbol with a crossed out battery - which tells me that the unit IS getting power from somewhere, how else could it display the symbol...&lt;/P&gt;&lt;DIV&gt;&amp;nbsp;&lt;/DIV&gt;&lt;DIV&gt;&lt;FONT face="Calibri"&gt;I have been happily using these great sanyo eneloop rechargables forever with the 580EXII (and before that with the 430EX), they are the best rechargable batteries i believe... &lt;/FONT&gt;&lt;/DIV&gt;&lt;DIV&gt;&lt;FONT face="Calibri"&gt;but when i take them out of the 580EXII (which powers on nicely, as always) and&amp;nbsp;&lt;/FONT&gt;&lt;SPAN style="line-height: normal; font-family: Calibri;"&gt;put those same charged batteries into the 600 EX-RT the symbol with a crossed out battery appears...&lt;/SPAN&gt;&lt;/DIV&gt;&lt;DIV&gt;&lt;SPAN style="line-height: normal; font-family: Calibri;"&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/DIV&gt;&lt;DIV&gt;&lt;SPAN style="line-height: normal; font-family: Calibri;"&gt;what's wrong???&lt;/SPAN&gt;&lt;/DIV&gt;&lt;DIV&gt;&lt;FONT face="Calibri"&gt;&lt;SPAN&gt;does the 600 EX-RT need special rechargable batteries?&lt;/SPAN&gt;&lt;/FONT&gt;&lt;/DIV&gt;&lt;DIV&gt;&lt;FONT face="Calibri"&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/FONT&gt;&lt;/DIV&gt;&lt;DIV&gt;&lt;FONT face="Calibri"&gt;&lt;SPAN&gt;should it be relevant: these are the batteries:&lt;/SPAN&gt;&lt;/FONT&gt;&lt;/DIV&gt;&lt;DIV&gt;&lt;FONT face="Calibri"&gt;&lt;SPAN&gt;&lt;A href="http://amzn.to/XBAm6F" target="_blank"&gt;&lt;SPAN&gt;http://&lt;/SPAN&gt;amzn.to/XBAm6F&lt;/A&gt;&lt;/SPAN&gt;&lt;/FONT&gt;&lt;/DIV&gt;&lt;DIV&gt;&amp;nbsp;&lt;/DIV&gt;&lt;DIV&gt;&amp;nbsp;&lt;/DIV&gt;&lt;DIV&gt;any additional ideas?&lt;/DIV&gt;&lt;DIV&gt;&amp;nbsp;&lt;/DIV&gt;&lt;DIV&gt;thanks!&lt;/DIV&gt;&lt;DIV&gt;tomas&amp;nbsp;&lt;/DIV&gt;&lt;DIV&gt;tomasloewy.com&lt;/DIV&gt;</description>
      <pubDate>Tue, 09 Apr 2013 20:01:56 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20085#M1256</guid>
      <dc:creator>TomasLoewy</dc:creator>
      <dc:date>2013-04-09T20:01:56Z</dc:date>
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    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20119#M1257</link>
      <description>Makes no sense. I also use the same batteries, used them in a 580EX II and a couple of 430 EX IIs. Now I'm using them in a couple of 600s.&lt;BR /&gt;&lt;BR /&gt;Not an expert on batteries but maybe there is a partial charge or battery memory issue going on. I do recondition my eneloops from time to time.</description>
      <pubDate>Wed, 10 Apr 2013 02:13:14 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20119#M1257</guid>
      <dc:creator>7D5D</dc:creator>
      <dc:date>2013-04-10T02:13:14Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20127#M1258</link>
      <description>thanks for the thoughts... and i also will agree: it makes no sense...&lt;BR /&gt;again: i am literally taking them out of the 580 and putting those into the 600...&lt;BR /&gt;&lt;BR /&gt;i also wrote canon support, so let's see if they come up with a reply. i'll share</description>
      <pubDate>Wed, 10 Apr 2013 04:03:03 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20127#M1258</guid>
      <dc:creator>TomasLoewy</dc:creator>
      <dc:date>2013-04-10T04:03:03Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20129#M1259</link>
      <description>stupid question, independent of the 600 question: how do you recondition your eneloops?</description>
      <pubDate>Wed, 10 Apr 2013 04:05:18 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20129#M1259</guid>
      <dc:creator>TomasLoewy</dc:creator>
      <dc:date>2013-04-10T04:05:18Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20131#M1260</link>
      <description>My Powerex charger has a reconditioning mode. This is one of Syl Arena recommended chargers.&lt;BR /&gt;&lt;BR /&gt;&lt;A href="http://www.amazon.com/gp/product/B000E5S648/ref=wms_ohs_product?ie=UTF8&amp;amp;psc=1" target="_blank"&gt;http://www.amazon.com/gp/product/B000E5S648/ref=wms_ohs_product?ie=UTF8&amp;amp;psc=1&lt;/A&gt;&lt;BR /&gt;</description>
      <pubDate>Wed, 10 Apr 2013 04:20:32 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/20131#M1260</guid>
      <dc:creator>7D5D</dc:creator>
      <dc:date>2013-04-10T04:20:32Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/26071#M1261</link>
      <description>&lt;P&gt;Hi,&lt;/P&gt;&lt;P&gt;did you ever find a solution for this problem. &amp;nbsp;two out of my three 600-ex-rt's have just "developed" this problem after working for a year? &amp;nbsp;thank you.&lt;/P&gt;</description>
      <pubDate>Thu, 30 May 2013 01:57:08 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/26071#M1261</guid>
      <dc:creator>laurie_rhodes</dc:creator>
      <dc:date>2013-05-30T01:57:08Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/26073#M1262</link>
      <description>&lt;P&gt;did you find a solution to your problem with the "battery dead" symbol?&lt;/P&gt;</description>
      <pubDate>Thu, 30 May 2013 01:59:38 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/26073#M1262</guid>
      <dc:creator>laurie_rhodes</dc:creator>
      <dc:date>2013-05-30T01:59:38Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/26667#M1263</link>
      <description>Same thing here. Strange. Thank you for this post</description>
      <pubDate>Tue, 04 Jun 2013 03:09:03 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/26667#M1263</guid>
      <dc:creator>digitaldubuque</dc:creator>
      <dc:date>2013-06-04T03:09:03Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/29491#M1264</link>
      <description>&lt;P&gt;I just got my 600 EXRT and I put new batteries into the device and found the same issue. I called around and found a solution that could help you. I powered the device down. Next I held down the two clear buttons under the display and turned the device on. I then move the power switch to lock and the device began working. I believe it reset the system and cleared out the problem.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Hope this helps!&lt;/P&gt;</description>
      <pubDate>Thu, 13 Jun 2013 20:07:11 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/29491#M1264</guid>
      <dc:creator>hcgraham</dc:creator>
      <dc:date>2013-06-13T20:07:11Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/33713#M1265</link>
      <description>&lt;P&gt;Hey guys,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I too have this issue. &amp;nbsp;I bought a new 600ex-rt from thecamerastore (calgary), and no atter what type of batteries I put in (duracel AA, or Energgizer Advanced lithium), I got the dead battery symbol. &amp;nbsp;This is hyper frustrating, I've tried everything so far suggested in the forums. &amp;nbsp;Anyone have any ideas?&lt;/P&gt;</description>
      <pubDate>Sun, 14 Jul 2013 22:53:15 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/33713#M1265</guid>
      <dc:creator>nvs397</dc:creator>
      <dc:date>2013-07-14T22:53:15Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/33715#M1266</link>
      <description>&lt;P&gt;I can confirm the above method of the reset with the clear screen hold, turn to on and then to hold. &amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;It didn't work the first time, it took me 5-6 tries to do it. &amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sun, 14 Jul 2013 22:58:25 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/33715#M1266</guid>
      <dc:creator>nvs397</dc:creator>
      <dc:date>2013-07-14T22:58:25Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/34523#M1267</link>
      <description>&lt;P&gt;Hi there,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;i had the same problem, i tried with my Eneloop but got the battery indicator, then tried with some alkaline (duracell) and the same problem, however i left the alkaline batteries in for a few minutes (i think the flash was OFF meanwhile) and after that it worked, seems like the system needed to get some juice into it first.&lt;/P&gt;&lt;P&gt;i havn't had the batteries in all night, and just popped them back in now, and there was no problem/wait, so perhaps it is just a firsttime thing ?&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;hope this helps, i was ready to replace my unit... i dont get why the manual says nothing about this "issue" .. that was very frustrating.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Regards&lt;/P&gt;&lt;P&gt;Simon&lt;/P&gt;</description>
      <pubDate>Sun, 21 Jul 2013 04:11:14 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/34523#M1267</guid>
      <dc:creator>SimonDK</dc:creator>
      <dc:date>2013-07-21T04:11:14Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/38031#M1268</link>
      <description>&lt;P&gt;I had the same problem. First I tried new batteries. No luck. I have two 600EX-RTs so I swapped batteries. The "Bad Batteries" workered in the other unit. The other units' batteries wouldn't work in the unit in question. I tried hitting the reset buttuns with no luck. I had had the new unit for a few month's but haden't used since I first got it. I was ready to return it. But of course I came here first. Holding down the two reset buttuns while turning the unit on is a challenge. Especially when you're ready to throw the thing down. First I tried holding the two buttons down while going from off to on and then lock. No luck. I tried it a few times. Then it tried holding the buttons down while going from off to lock then on. No luck again. Then I tried opening the battery compartement, turning the unit on and then closing the door. No luck again. I gave the first solution again, by holding the two buttons down, going from off to on then lock. Then it worked. This was at 10:00 at night and I was tired and might not have all the sequences exact, but the moral of the story is to try and try again. Hope this helps.&lt;/P&gt;</description>
      <pubDate>Sat, 31 Aug 2013 02:18:32 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/38031#M1268</guid>
      <dc:creator>rdance3</dc:creator>
      <dc:date>2013-08-31T02:18:32Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/42841#M1269</link>
      <description>&lt;P&gt;Finally got it running doing the clear screen hold/reset and then turn on method. &amp;nbsp; As you said it took more than one try - in my case seven times. &amp;nbsp; Thanks to nvs397 for pointing out that you have to do it multiple times or I would have been stuck.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Kind of a stupid thing to have to do. &amp;nbsp; Not sure why Canon cannot fix this...&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sun, 06 Oct 2013 13:48:06 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/42841#M1269</guid>
      <dc:creator>Nukemttg</dc:creator>
      <dc:date>2013-10-06T13:48:06Z</dc:date>
    </item>
    <item>
      <title>Re: Speedlite 600ex-rt battery problem</title>
      <link>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/43781#M1270</link>
      <description>Hi&lt;BR /&gt;&lt;BR /&gt;I just unboxed my 600ex-rt and it shows the same battery symbol... I put the flash on my camera and te af assist beam actually works but the screen shows the striked out battery and the flash does not go off... I tried the on position with the battery cover and it doesn't work... Any advice??</description>
      <pubDate>Sat, 12 Oct 2013 08:16:36 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/Speedlite-Flashes/Speedlite-600ex-rt-battery-problem/m-p/43781#M1270</guid>
      <dc:creator>SteynLaubscher7</dc:creator>
      <dc:date>2013-10-12T08:16:36Z</dc:date>
    </item>
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