Vapcell S4+

The Vapcell S4+ V3 is also a good charger that works for 14500-21700 lights easily

If you're looking for affordable and still feature-rich, then you're looking at options such as the Vapcell S4+

Personally, I'm into the Vapcell S4+ since I can fill all four slots without reducing charge rate on any of them

I have had the Vapcell S4+. Have charged a 21700, 18650, 18350, and a 14500 all at the same time. Each automatically being charged at different rates, and worked flawlessly. It’s usually my go to when I recommend one.

The controls for dedicated chargers like the Vapcell S4+ or SkyRC MC3000 can be critical when you're charging smaller batteries such as 14500s or 10440s. Being able to regulate down to 250mA charging for a 14500 cell or slow charge larger batteries when you're not in a rush can afford you better care for the batteries you have.

None of these are charging to 4.25V and most are hitting 4.2 very precisely. The +/- 0.05 on the package is to keep people from having something to complain about when it's 4.19 instead of 4.20.

For charger, would also recommend spending a bit more and getting the Vapcell S4+ V3 (probably from the official AliExpress store or similar)

I love my Vapcell S4+ v3 but you're not in for a fancy four-bay.

One of the most recommended is the Vapcell S4+ V3.0.

Mine is set to Manual mode and 500 mA to avoid the possibility of it even thinking about charging my 14500s and 18350s at a higher rate. ... Bonus points for monitoring cell temperature (first sign of charging problems), having each channel independent so I could charge at 3A on all four bays instead of the rate dropping as I fill the bays