When putting in more than one battery in a device, why should they all be at the same charge?
In: Chemistry
Most of the comments here are concerning parallel connected batteries, but that’s a very uncommon configuration. Most alkaline batteries are connected in series. When you put batteries in series, a partially discharged battery will become empty a lot sooner than the other batteries. An empty battery can’t stop the circuit from working, though. Instead, the empty battery will get “charged backwards”. That battery will start getting warm inside, and then start leaking. It will eventually ruin the battery contacts in the device.
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