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This is my setup for the first charge of the Li-Poly battery used in the a Bicycle Video Recorder. I had the battery sitting in a partially covered ammo can, my multimeter and thermocouple monitoring the battery’s temperature, and the charger connected to a Kill-A-Watt to show current flow. While charging occurred I’d periodically check in on this to be sure the temp isn’t way up, current draw isn’t unexpectedly high, or the battery hadn’t exploded. Not pictured is the fire extinguisher which was located ten feet away from this setup towards the stairs.
As the green light on the charger shows, the battery is now charged, and everything sitting in place without a coating of extinguisher dust shows that nothing exploded. Now it’s time to grab an 8GB or 16GB SD card and do a runtime test. That sounds like a job for tomorrow, though.