Будь ласка, радий, що це допомогло

Same. Absolute trash quality. Just classic coming from American corporations built Chinese trash and charged for high quality

If you've swapped the battery and it works for the hair trimmer, then it could be the cutter motor, or perhaps the cutter draws more power?

Have a look at my video of a similar issue here,: kzfaq.info/get/bejne/hs2dlLBkmcfdaac.html you may well be able to get a USB charger for it, in which case you can hook it up to a portable power bank and can continue using it ;-)

Got the same machine and it's my fav electric trimmer that i've ever used, i haven't soldered much before and when i've tried it hasn't gone well. I really wanna save this trimmer, it's in great shape otherwise but won't turn on anymore, i assume the battery is toast. Any tips when soldering so i don't destroy it?

@@Pingaheimer can't reply from my phonne for some reason so this will have to be a summary of the paragraph i typed out lmao. Buy yourself a 2.4v handheld phone battery, they're the cheapest and easiest option to find. get a 700/750mAh, the charging circuitry prefers if you stay as close to the original capacity as you can. Once you've taken it apart and you have the battery unit, cut the leads as close to the battery as you can, from there strip back a couple mm of the wire, it should be 22/24 awg if I recall so it will be a bit tricky, just take your time here so you don't need to cut twice. get your phone battery, take it out of the plastic shell it's in and use electrical tape to tape down the welded tabs to their appropriate sides, you'll likely have one facing down and one facing up with their corresponding wires. cut the wire to be roughly equal to the original wires length. After this, flux & tin each wire end, Red wire to red wire and black to black. you can optionally also twist the opposing wires together or push them together and then tin them, This isn't a high stress joint so it doesn't really matter. After you've done that and are ready to solder it, place your soldering iron underneath the wire but making firm contact and immediately push a piece of solder into the top of the connection. It should almost instantly start to flow down into the joint, you only need a second or two for it to flow. After all that, put it back into the battery tray like it was originally, and electrical tape the entire battery unit together like it was as well being careful not to tape the buttons. Then just put it together and you should be good to go.

can li-on be used instead of nimh?

@@HOTSPEEDMike nah, the BMS doesn't play nicely with lithium cells.

Soldering isn't that easy