We take three good 18650 3200 mAh, we wind them with electrical tape and connect them. A regular AB120LE battery costs the same amount, a standard ZU120LE charger costs the same amount, if you https://jiji.com.et/supplements/appetite buy everything together, you get completely non-budgetary 6,000 rubles, but we will go the other way. 🙂 Reciprocating saw mode.
It is called Hammer LZK 1000LE. Sold without battery and charger. The battery there is assembled from three standard 18650 cells, and for a miserable 1300 mAh. I saw a small 2-in-1 cordless saw (jigsaw / reciprocating saw) there and, without thinking twice, bought it.

A battery saw for 2000 rubles

Yesterday I was passing by a hardware store and just popped in to "gaze". It costs 1999 rubles. We attach two contacts from (nickel strips for connecting these same batteries). I will use IMAX B6 to charge it, but any other universal charger will do. There is speed control and a quick-release chuck. In theory, you can’t solder them – they can explode, but if you do it very quickly and with the help of a flux for soldering aluminum, then you can 🙂 The battery is ready.