Is it OK to mix batteries with different voltages?

Is it OK to mix batteries with different voltages?

Lithium-ion batteries are widely used in many of our electronic devices and can be used to build all sorts of cool electrical devices, but it’s important to be aware that these are governed by some basic electrical principles, and that neglecting to follow those principles can pose significant dangers.

So, is it OK to mix batteries with different voltages? No, generally speaking. You may ask: "But why? I have a 36v battery and a 48v battery, can't I just combine them together for more power?"

Mixing different battery voltages can be harmful because the voltage levels are not compatible. Using batteries with different voltages can cause damage to the device or equipment being powered, and in some cases can even be a fire hazard. Additionally, using batteries with different voltages can also result in uneven charging and discharging, which can reduce the overall life of the batteries. It's recommended to use batteries with the same voltage to ensure safe and proper operation.

Now before the experts jump all over this, technically it is possible to join batteries with a voltage differential, but it is usually a tiny voltage differential. This also depends on the battery chemistry and sizes, but we won't get into more technical things like backfeed, SoC dependence, equalizing current flow, charging curves, and so on (that will be for another time). Generally, use batteries with the same voltage.

It's always best to err on the side of caution when it comes to lithium-ion batteries. Keep on DIY-ing! Don't forget to check out JAG35's New Arrivals now!

"The only way to be cool is to follow the rules."
-Captain America

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