How do I take care of my battery is one of the questions I keep asking me. And that's a good question, because new technology makes batteries last longer and easier to use. There are three main types of rechargeable batteries used in digital cameras: nickel-cadmium (NiCad), nickel-metal hydride (NiMH), and lithium-ion (Li-on).
NiMH and Li-on behave the same way in digital cameras, so we will treat them the same for the purposes of this article. I will refer to the two of them as NiMH. You can also purchase Sony 18650 battery online via https://vapebatteries.net/collections/sony.
We have used NiCad for many years. These batteries work fine but must be discharged to zero before charging. This way they can fully charge again. If you try to charge it earlier, the "memory effect" will start and the battery will not be fully charged.
NiCad can't charge as much as newer types of batteries, so the battery won't last long in a digital camera. Then the NiMH battery appeared. They work really well in digital cameras because they manage to put more energy into each battery.
If you check the details, the battery is now built at 2700 mah (mile ampere-hour), which is generally an estimate of how long the battery will last (the higher the mah, the better). That's about double that of NiCad. Another benefit of NiMH is charging. This battery likes to charge. They work best when they are 40-60% depleted and then refilled.