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A small amount of 'puffing' (1 or 2mm) is nothing to worry about, provided that it wasn't caused by over charging or discharging and the battery is otherwise in good health (cells stay in balance, has …

Can I charge as fast as I want, provided that I cool down sufficiently? No. To charge faster you need higher voltage to overcome internal resistance. If the voltage is too high it may cause dam …

Lithium Manganese Dioxide Battery (Li/MnO2) - Maxell Using different batteries together, i.e. different type or used and new or different manufacturer could cause distortion, leakage, overheat …

several boxes with close manufacturing dates that have held sets of about 100 cells each (in close proximity) and in which several failed. All batteries with expiry date way into the future Properly …

Li-ion is primarily chosen for higher energy density (by weight and volume), but also for higher power, higher voltage, more flexible form factor, cheaper and easier manufacture, more efficient chargi …

There is resistance in the metal of the plates and wiring, active plate materials, and electrolyte. The heat produced by this resistance is proportional to current squared. In metals the resistance …

I found the article having deficiencies and looking to find more "accurate" and scientifically minded studies on batteries charging / discharging effects / performances (that study disclosed sample s …

When selecting a battery charger, what ratings must I know (from both the charger and the battery)? Charging algorithm must match the battery type. Charger nominal voltage / number of cells must m …

I've always assumed that the lower the voltage, the less material degradation, but that starting a storage cycle with a voltage too low runs the risk of dropping the voltage to a point where th …

According to PUSHEVS, the specs of the 40 kWh and 62 kWh batteries are:- 40 kWh battery Total battery capacity: 39,46 kWh Usable battery capacity: 36 kWh (91 %) Battery weight: 303 kg Battery energy …

does the battery take zero current once it's at 3.7 V? Yes. Or to be more precise, once the battery voltage reaches the regulated power supply voltage the charge current will reduce exponentially …

The problem with this is that the batteries are charged using PV cells which means I am employing an MPPT algorithm to adjust the voltage to deliver the most power to the batteries so this is not an …

30 minutes is about what you will get. At 1C (the theoretical '1 hour' discharge rate) a typical Pb battery has about half its rated capacity, so a 4Ah battery can do 4A for 30 minutes.

Storing them "discharged" to ~3V with the device they were used in still preserves lots of energy in the battery. At 3V a Li-ion battery has almost no capacity left. In this graph two 800mAh …

Lithium thionyl chloride has a much flatter discharge curve than Li-ion. Here's the discharge graph of a Varta C size 8.5Ah LTC cell:- and here's a discharge test of an LG 2600mAh 18650 Li-ion cel …