Battery powered pyrometers

Battery

— powered by its own battery of the original standard, which can also be made non-removable. On the one hand, such power supply has a number of advantages over replaceable batteries. So, the battery is initially supplied in the kit, it does not need to be purchased separately; and when the charge is exhausted, you do not need to spend money on fresh batteries — just put the device on charge. On the other hand, charging requires a power source and takes quite a long time, while batteries, with spares, can be changed in a matter of seconds. Therefore, this option has not received much distribution.

Also note that some models with such a power supply allow replacing the battery with a set of AA batteries (see the relevant paragraph). At the same time, it is batteries that can be supplied with such a device, but the battery will have to be purchased separately (or removed from another device — some manufacturers produce universal batteries suitable for different types of tools).