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9V rechargeable batteries

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tHoagland

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I can across these batteries today and wondered if anyone had used these, or something similar for power their deployment altimeter.

ZNTER S19 9V 400mAh USB Rechargeable 9V Lipo Battery https://www.amazon.com/dp/B01M2Z442X/?tag=skimlinks_replacement-20


They are 400mAh LiPo batteries in a standard 9V form factor. They charge via USB with the charge controller embedded into the case. If it's capable of sourcing enough current to light ignitors, they could be a great addition to a rocketeers tool box.
 
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dhbarr

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Appears to be two LiPo cells in parallel with a boost converter. I'd expect it to burn more juice than usual sitting on the pad, no idea on max current capacity but likely limited.

EDIT: yup, there's a protection circuit which kicks in and the output drops to 1.9V unboosted. I would -not- recommend these for flight.
 
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r66astro

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I bought some similar, no boost, 2 cells, 8.4 volts full charge. 600mAh
 

cerving

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For what they're charging, you can buy three or four 500 mAH 2S LiPo's from HK, and you know exactly what you're getting.
 
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