Twupixy 2Pack 18-Volt Replace for Makita 18V Battery BL1860B, Replacement Batteries Compatible with Makita BL1860 BL1820 1830B 1840B 1850B, Fit with Original makita 18V Battery Chargers

They are great. Both charge in my Makita charger and fit the drill. No problem. The charge seemed to last forever. I used one battery off and on for 2 months before starting to use the other one.

the product came without original charger and delivery was too longer than the expected date which was useless to me

El producto funciona y se adapta bien a los maquita el detalle es que el amperaje de 6 me rinde igual que una original de de 3 quizá un poco más, pero su precio puede que compense esos detalles, si lo recomiendo se tardó pero llegó y cumplió.

For the price, this battery (BL1860B compatible) is very good. The main downside is that the BMS is not protected against water. I've opened the battery and I've added a layer of conformal coating (a varnish) on top of it, and now it's all good. Other than that, the BMS looks very modern. There is a sensor for temperature, a pair of mosfets to cut current and shunt resistors than allows the BMS to monitor it. So protections that are claimed are actually implemented. I didn't see any obvious circuitry for cell balancing, but I would be surprised if it wasn't there, considering everything else that is already present. The battery charges up to 21.75V (4.15V per cell). It discharged to 17.5V (3.5V per cell) before it cut off (with a somewhat high current draw). Those are very conservative numbers. I wonder if it is done to be able to use very cheap cells that would be dangerous otherwise, or just to provide a margin of safety and more longevity. Anyway, I appreciate that. I don't know if the claimed capacity is real, I have not measured it. It was absolutely fine for my use case. It is probably the capacity one would get if the cells were used over their full voltage range. It might not be what you get in practice with the conservative cut-offs that are in place. I am very happy with them so far.

Ive always had good luck with these batteries. These will be used in my new makita lawnmower. Just have to wait for snow to melt. The last two I bought were for my mikita trimmer and leaf blower and am very happy with them. Great price.