Can you replace a battery in a tablet? That’s a good question. It’s almost always possible. The question is whether it’s practical. Some companies make it really easy to replace a battery, and some make it really hard.
The batteries in my kids’ first tablets, made by Asus, were pretty easy to change. It was just a matter of opening the tablet, pulling up on the connector, and swapping the battery. Opening the tablet was harder than changing the battery. Finding the right battery was probably the hardest part of all, since they seem to be a bit different.
My kids wore out the USB ports on those tablets, so I replaced them. This time I bought the cheapest decent tablet I could find: a Digiland tablet from Best Buy. That battery isn’t designed to be replaced. The battery is soldered to the motherboard, and I don’t recommend soldering to batteries. The heat can cause them to explode. If you can find a suitable replacement, snip the wires from the old battery, then splice those wires onto the wires on the new battery instead. There’s no danger in that. It’s just more hassle than plugging a new battery in. But Digiland batteries aren’t hard to find on Ebay.
When it comes to Apple Ipad tablets, Apple doesn’t want you replacing batteries. They want you to send in your old tablet and $105, and they’ll send you another one. You can change the battery yourself, but you’ll spend $50-$90 on the tools you need and the battery.
The ironic thing is the closer the battery is to the extremes of the price spectrum, the harder it is to replace the battery. Sometimes it’s cheaper, or at least less hassle, just to buy another tablet.