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Is it safe to discharge li ion below 2.5v?

Li-ion cells usually work in the range of 4.2V (while charging) to 3V (fully discharged). This voltage range MIGHT differ depending on the manufacturer and their cell chemistry. But this is a general ...
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Can't find formula to calculate resistor values for a BQ34Z100

To calculate R3 we must define a useful current through D7. We want to keep the current drawn from the battery as low as posible, so let's set 100 µA here. This is not optimal for the Z diode ...
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Why Would All Li-Ion Cells in a Battery Pack Go Dead at the Same Time?

A bad BMS often kills the pack. I had a series of scooter battery packs, where the software in the BMS had bugs and could crash. The bleeding transistors of the balancing circuit were turned on and ...
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How dangerous is soldering a lithium ion phone battery? How easy is messing up?

It's less of an "explosion" and more of a very sudden, very hot fire. Can it injure you? Yes. Can it destroy your workbench and everything on it? Yes. Can it burn your house down? Possibly, ...
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Can I charge a 3.7V 150mAh LiPo battery from USB?

First, as people already noted, your "USB port" or "USB charger" are not Li-ion chargers, they are constant-voltage (5V) power supplies, maybe with some limitations. Your MP3 ...
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Can I charge a 3.7V 150mAh LiPo battery from USB?

They had 150-190 mAh Li-Ion batteries. All I can find are Li-Po replacements. What you call "Li-Po" IS a Li-ion cell. It's a pouch Li-ion cell, but a Li-ion cell nonetheless. Can I charge ...
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What does the 'C' marking on this battery indicate?

NP-FZ100 is the battery supplied with Sony α9, α7R III, α7 III, a9 II, a7RIV, a7S III, a7C cameras. The terminal marked 'C' is for serial communication to display the remaining charge of the battery ...
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What does the 'C' marking on this battery indicate?

That's the Sony A7 etc. battery. There is circuitry including a microcontroller inside the battery package. The C likely stands for "communication". Communication is digital. Maybe someone ...
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