scattered about on various pages.5% in 24h, then 1–2% per month (plus 3% for safety circuit)Hello, I just found this excellent website.John Fetter—No i am a ni battery engineer from China, my email is zzrm316@163.com . Table 4: Nominal and recommended end-of-discharge voltages under normal and heavy load.The lower end-of-discharge voltage on a high load compensates for the greater losses. Maybe samsungs cut off protection level is higher than the standarf 2.9v for this very reason.If my new battery from my phone arrived in a 1% state and it was left in the warehouse for 3 months according to this article the self discharge would be greater esp if it’s been in a low voltage state less than 2.5V.
It would be even better if a microcontroller could use that model to deduce/estimate the internal state of the battery -- in particular, the state of charge (SoC) and the depth of discharge (DoD). These are typically made with a step up transformer and a rectifier. The 4200mv or 4.2v should show at 100% correct?TLDR: I’m questioning the low self discharge for Li-Ion cells given in the article up there.Can anyone answer my question from earlier please:Further to this i dont know how long it was left in warehouse for but i got a new samsung phone with a 3000mah batttery as a new replacement and it came shipped again with 0% battery and wouldn’t turn on and was made in dec 2015 meaning it could have been lying on the shelf for nearly a year.Can someone clarify what the % of self-discharge is referenced to in Table 4: Self-discharge per month of Li-ion. The cell discharges itself 83 times faster than your radio in standby.Edward - You might like to explain why.I have battery thats come from my old laptop. Compare mAh at 1A: With devices that pull more current the eneloop batteries really show their strength. Should we rather go with a Lithium-Ion battery?My battery gone deep discharge so how can I charge ?The reason for asking this is that I recall a supplier comment some time ago regarding Li-SOCl2 primary cells, which suggested that a small continuous current excited the chemistry sufficiently to reduce the effects of self discharge.2–3% per year (7-10 years shelf life) You can find more info. But it doesn’t take much to make it drop to 3.8 x 3, or 11.4V. My latest concern was in a project involving a 200maH LiPo. I try to recover it and re use the battery but when a single cell well charge it from 0 volts to 3.5v, but after 10 hours the voltage drops without load. The time constant is also the circuit's response to a constant voltage input so engineers frequently use the time constant as a cutoff frequency for a circuitUsing a battery discharge calculator can give you a deeper understanding of how different battery materials affect discharge rate. - What is the typical discharge curve (Voltage(time)) of alkaline AA with very low discharge currents (20uA)? The 2 aftef the first one came with 60% already charged. As cold as possible. There may be an exotic battery costing a very large sum of money that will work. I’d suggest you consider it normal for the load you described to drop the amount you described. Charging batteries that are being kept in a hot warehouse is not a good way to solve the problem.Impurities are present in the negative plates at the time of manufacture, however, they get buried in the negative active mass over time.