sdchew
 lvl.3
Singapore
Offline
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I'm not entirely sure either but these batteries are 'intelligent' batteries in which information is stored on the batteries. Typically smart batteries have self protection functionalities to prevent over charging/discharging. In addition, smart battery systems typically have some counterfeit detection system to lock out fake/3rd party batteries.
To be honest, I'm unsure what exactly resolved the problem. All I have is the sequence of events;
- Unable to use original battery. Only able to use the spare battery purchaced. - Orginal battery shows green in charger but flashy red in the Osmo
- Attempted to discharge the battery overnight. Battery was able to charge in charger after which but still flashy light in Osmo
- Discharged the battery for 2 days. Attempted to flash the 27th Dec bug fix firmware via SDCard after formating the SDCard on my PC. Do note that this is after I successfully applied the 25th Dec firmware (also via SDCard)
- On a hunch, pulled the original battery from the charger (did not charge it) and plugged it into the Osmo
- Osmo could fire up and showed 90+%
In my situation, I suspect the following;
The battery was actually fully charged, hence the green light condition on the charger. The Osmo on the other hand refused to let me use the battery (red blinky light similar to low battery condition) for some reason.
So either the new firmware had some new safeguards which initially prevented me from using the battery (over voltage?) until the discharge brought it down to a lower state or 3rd party battery detection portion got screwed up on the 25th Dec update and it falsely rejected the battery.
Now that both batteries are working, I noticed something really interesting. The serial number of the original battery has 4 digits while the purchased spare has only 3 digits. This is despite the fact the orginal battery is reporting it was manufactured in September and the spare in December.
I kind of wish DJI made a more sophisticated charger like those for the drones in which it could discharge or refresh the batteries. Dual battery chargers would be great too.
Barry, in your situation, I suspect your charger is either busted or the pins aren't connecting to the battery anymore. I saw some posts (can't remember on this forum or on the facebook page) that the pins in the charger can get easily damaged. Maybe you should hop down to any store which sells the Osmo and try to charge any one of your batteries with their charger. Probably a seriously bad idea to attemp a firmware update with 8% battery left.
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