I recently ordered a few
LIR1025 coin cells from China. The LIR series seems to be a rechargeable lithium-ion alternative to the venerable CR series lithium primary cell.
Despite their questionable origins, they actually are a pretty useful cell: various sources online for the LIR1025 state 6 mAh capacity, which isn't great energy density (primary silver oxide cells do better) but they are rechargeable, and the pulse handling capability is remarkably good for very low duty cycle large current pulses. I tested the 6 mAh claim by discharging the cell through a resistor and logging the voltage across the resistor, and it's actually true:
I have an application at work which would really benefit from these cells, but I can't find them anywhere except places like Alibaba. Is anyone aware of anyone who manufactures these cells? Preferably I'd be after a supplier outside of China, but China could be OK as well provided it's an established company with good quality control that I can send auditors to for site visits.