Diamond Geezer Posted September 21, 2021 Share Posted September 21, 2021 Hi guys pretty new to leccy how many amps should I charge a 14.8v 4000 mah battery and how quick can I charge it Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted September 21, 2021 Share Posted September 21, 2021 15 minutes ago, Diamond Geezer said: Hi guys pretty new to leccy how many amps should I charge a 14.8v 4000 mah battery and how quick can I charge it You would normally charge at 1c so a 4000mAh battery would charge at 4 amps. How long it takes to charge depends upon how much charge was in it to start. Assuming 75% of capacity has been used it should take about 45 mins to an hour depending upon how gently the charger puts the last bit of charge into the battery. Quote Link to comment Share on other sites More sharing options...
Mitchell Howard Posted September 21, 2021 Share Posted September 21, 2021 (edited) 53 minutes ago, Diamond Geezer said: Hi guys pretty new to leccy how many amps should I charge a 14.8v 4000 mah battery and how quick can I charge it I've got nothing but 4S 3700s. Always charge at 1C, 3.7A. From storage 3.85V/cell, we're talking 30mins to get up to 4.2V/cell. Always charged on a balance lead. Edited September 21, 2021 by Mitchell Howard Quote Link to comment Share on other sites More sharing options...
Jonathan M Posted September 21, 2021 Share Posted September 21, 2021 43 minutes ago, Shaun Walsh said: You would normally charge at 1c so a 4000mAh battery would charge at 4 amps. How long it takes to charge depends upon how much charge was in it to start. Assuming 75% of capacity has been used it should take about 45 mins to an hour depending upon how gently the charger puts the last bit of charge into the battery. Completely agree with charging at 1c, but do people really regularly run LiPo batteries down to as low as 25%? For longevity I don't like to go below 35% min, so aim to land on 45%, which still gives me another 10% in hand in case I have to go around etc. Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted September 21, 2021 Share Posted September 21, 2021 I charge at 1C generally - the only exception being the 3s1p 1500mah LiFe transmitter packs, which I charge at 0.8C. I've never had a meter that measured the percentage left in a battery, I just try to run mine down to the storage voltage of 3.85v per cell. Quote Link to comment Share on other sites More sharing options...
Dad_flyer Posted September 21, 2021 Share Posted September 21, 2021 Good advice for care of lipos: https://www.4-max.co.uk/pdf/prolong-life-lipo.pdf Quote Link to comment Share on other sites More sharing options...
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