DJI Battery counter/logger
thingiverse
It's always advisable to rotate your RC batteries. especially if they are the smart ones. This is a simple little thing to keep tabs on what battery to use next. It uses raised dots to represent 1, 2 and 3. Just move the peg to whatever fits your battery strategy. Personally, I just use it to tell me which battery should be used next, but you can use it however you see fit. The peg is quite a snug fit, and is a bit of a challenge to get printed accurately. If you can't get it right, then you can scale up or down a few %age as needed. I've also added a loop so that it can be attached to something in/on your bag.
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