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Old 10-25-2017, 04:09 AM
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lisarea lisarea is offline
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Default A whole entire thread about one stupid question about batteries.

So I want a backup battery for a phone, but I cannot reasonably find one with the exact model number of the battery in there. The model number is BL-52UHA. I can find others that are models BL-52UH and also BH-52UHB, though, which makes me suspect that the BL-52UH is the one I'm looking for, but I'm not 100% sure.

But they're like $5, so I'm willing to take a chance on that $5, which leads me to my actual question:

As long as the capacity and the voltage are the same, are there any risks to just getting one and seeing if it fits? I mean, is there something I'm missing that might go wrong, like explode or damage the phone some other way?
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Old 10-25-2017, 04:27 AM
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Default Re: A whole entire thread about one stupid question about batteries.

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Old 10-25-2017, 08:59 AM
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Default Re: A whole entire thread about one stupid question about batteries.

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Old 10-25-2017, 11:38 AM
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Default Re: A whole entire thread about one stupid question about batteries.

Most phone batteries have three wires or connections - two for the single lithium cell and one for a thermistor inside the battery so the phone can measure how hot the battery is.

The lithium cells used in all modern phones are all the same chemistry with a nominal voltage of 3.7V or 3.8V per cell and a maximum fully-charged voltage of about 4.2V per cell. The only real difference is the mass (and therefore capacity) of the cell and its form factor (shape).

Most batteries have additional protection circuitry inside the battery to protect against short-circuit and over discharge.

There are some (rare) phones that use two-cell batteries so they'll be labelled 7.4V (or close to that).

Some (very old now) phones used to use nickle metal hydride batteries, but the BL52U battery isn't one of those.

If the replacement battery has the same sort of connection as the original one - either plug/socket, surface connector or soldered flat ribbon cable - then you'll be okay.
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Old 10-25-2017, 11:49 AM
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Default Re: A whole entire thread about one stupid question about batteries.

Quote:
Originally Posted by ceptimus View Post
If the replacement battery has the same sort of connection as the original one - either plug/socket, surface connector or soldered flat ribbon cable - then you'll be okay.
At least, roughly as OK as with the original manufacturer. Which may not be very OK [cough]Samsung[/cough]
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