And hopefully l near the same milli amp. (ma)..Not slightly less....if any thing slightly more ! that determines how long it will last running the remote controller !Buy a lipo battery that's the same voltage, cut a hole in the controller, stick pigtail out. Or, send to DJI for replacement.
Ken...a fantastic post and i'm sure many more will benefit from this post then a very few.I've been looking, apparently the originals were two flat pack style lipo's (similar to what's in the AC battery packs) with a special balance charger circuit. I recently saw another photo on the forums here that showed what appeared to be a pair of 18650's shrink wrapped together - from the factory. I've seen a few YT videos showing replacing with a battery pack (2S) for something like an RC car, but requires a balance charger to properly charge. I did find a balance charger that looks like the factory one on Ebay for about $4, but I'm not sure if my RC has the flat packs or the two 18650's in it. (I haven't opened mine yet, waiting on the balance charger to get here.) Battery shows at 57% but never seems to drop - two solid and one blinking light. From what I understand, the battery in the RC was rated at 6000 mah so it could run for 6 hours without a charge so something about half that size would be fine (3000-3500 mah aftermarket.)
Two 3000 mah 18650 batteries with a $4 balance charger should do fine and fit easily in the factory battery space.
Ken...a fantastic post and i'm sure many more will benefit from this post then a very few.
FYI I cracked my controller this evening - sure enough, it has the big pocket for a larger size battery, filled with foam and a pair of 18650's that have this charger circuit attached to them. Batteries measure 3.75v each - the charger outputs 17.36v at the plug, but is regulated on the RC board down to 8.36v - which is passed to the batteries. I unplugged and re-plugged them and now it seems to be charging right? I'm going to let it charge for a while and see what it does, put it back together. I can't see any bad solder joints on the charger board (then again, my eyesight isn't what it used to be.) At this point I might put it back together with the ARGTek antenna setup and be done with it.
However.......I'm sure dangers are involved in the re flow process of destroying a part or parts by excessive heat from solder iron....that procedure is delicate .and please don't do it Unless your willing to take the chance of damage to very tiny electronic parts ! (BIG SIGH) I hope it all works just fine the way it is.The factory battery is a 2S1P with a PCB. If it is reading 8.3-8.4v then is is fully charged and should get all 4 lights and 99-100% in GO app. If not, you’ll need to reflow the RC board. You won’t be able to see any bad solder joints. They are usually Microfractures that cannot be seen.
However.......I'm sure dangers are involved in the re flow process of destroying a part or parts by excessive heat from solder iron....that procedure is delicate .and please don't do it Unless your willing to take the chance of damage to very tiny electronic parts ! (BIG SIGH) I hope it all works just fine the way it is.