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 Using LiFePO4 battery		  New Topic  Reply to Topic
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Bob6547

1 Posts
Posted - 05/04/2023 :  16:24:46  Show Profile  Reply with Quote
I just bought a GMC-320S. I curious to know if anyone has tried using a LiFePO4 14500 battery in this unit. The voltage would be 3.2V instead of the 3.7V of the standard Li-ion battery. I prefer LiFePO4 in my devices whenever possible.

Bob
Reply #1

EmfDev

2250 Posts
Posted - 05/05/2023 :  09:32:38  Show Profile  Reply with Quote
We havent tested yet. The result is unpredictable. The 320S charging circuit allows a maximum of 4.2V. If the battery is overcharged over its maximum voltage capacity, it may cause damage. Please do not try it yet. We will test it soon.
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Reply #2

ullix

Germany
1171 Posts
Posted - 05/07/2023 :  23:10:21  Show Profile  Reply with Quote
My preference is LiFePO4 as well.

But as the specs say:
Maximum charge voltage 3.8 V
there may currently be a problem when your max charge voltage is 4.2V! I am eager to hear your test results.
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Reply #3

EmfDev

2250 Posts
Posted - 05/09/2023 :  10:27:06  Show Profile  Reply with Quote
We tested with a 3.2V LiFePO4 with GMC-300S, it can be charged ok but we only tested for few hours. Also used a standard 4.2V Li-Ion charger and can charge up to 4.2. However, over few hours the charge was back to 3.7V without using the battery. Overcharging is not good to the battery and we do not recommend it as we only tested for a few hours.
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