There are lots of resources online, for example bigclives videos.
This is the gist:
Depends on the kind of model, but usually you have two caps one one tube. If you take the one opposite to the mouthpiece out with a pair of plyers, you can usually slide the electronics out. Cut the wire at the battery and there you go. Just be careful: they usually are the pouch type, wich means its not that hard to squish, puncture or bend them, which might anger the spicy chemicals inside enough to have it ignite. Put them in the little plastic containers for photigraphic film rolls, pills, or something else rigid. Usually they have solder tabs that you can poke through the lid and bottom to connect to them. You can also solder some wire to these tabs instead.
Make sure to always follow safety precautiobs for small lithium cells, for example not heating it above 50°C. You might also want to add a cheap single li-ion cell protection PCB
You can repurpose them for low-power applications like wireless sensors. If you need more capacity, solder them in parallel, after making sure they are at the same voltage ±0.1V
For a charger you can use a TP4056 module, many of these have protection built-in. You can tell by them having two more small chips near the solder pads, and of those pads having 4, two for battery + and - , and two for whatever you are attaching that will be protected
you can usually find them by sth like tp4056 modulewith battery protection circuit
the ones with usb c usually are designed without the cc pulldown resistors and thus will usually only function with usb a to usb c cables
There are lots of resources online, for example bigclives videos.
This is the gist:
Depends on the kind of model, but usually you have two caps one one tube. If you take the one opposite to the mouthpiece out with a pair of plyers, you can usually slide the electronics out. Cut the wire at the battery and there you go. Just be careful: they usually are the pouch type, wich means its not that hard to squish, puncture or bend them, which might anger the spicy chemicals inside enough to have it ignite. Put them in the little plastic containers for photigraphic film rolls, pills, or something else rigid. Usually they have solder tabs that you can poke through the lid and bottom to connect to them. You can also solder some wire to these tabs instead.
Make sure to always follow safety precautiobs for small lithium cells, for example not heating it above 50°C. You might also want to add a cheap single li-ion cell protection PCB
You can repurpose them for low-power applications like wireless sensors. If you need more capacity, solder them in parallel, after making sure they are at the same voltage ±0.1V
Most of them are around 3.6V, I just need some protection circuits and a way to charge them
For a charger you can use a TP4056 module, many of these have protection built-in. You can tell by them having two more small chips near the solder pads, and of those pads having 4, two for battery + and - , and two for whatever you are attaching that will be protected
you can usually find them by sth like
tp4056 module with battery protection circuitthe ones with usb c usually are designed without the cc pulldown resistors and thus will usually only function with usb a to usb c cables