At its core, powering up a rechargeable battery is a simple task, and the Zanflare C4 can handle your everyday charging needs easily and efficiently. It fits and charges all sorts of battery types, from standard-sized AAs and AAAs rechargeable batteries to various Li-ion options. You can even mix and match different types to charge at different rates at the same time since each of the four slots charges independently. And it’s a “smart charger” that knows to stop charging when a cell’s at full capacity, a critical feature to avoid overcharging your batteries and damaging their lifespans.
But beyond the basics, if or when you want to step up your battery-charging game, the Zanflare C4 still has you covered. It serves as a battery analyzer, displaying live information about each battery on its back-lit LCD (which dims with inactivity). You can cycle through data such as voltage, how much has charged and how time is left until it’s full. You can control the current on each slot, either 300, 500, 700, or 1000 mA — essentially the rate you want to charge each battery. There are also test modes that can serve to refresh and more accurately analyze batteries by fully discharging (at 300 or 500 mA rates) and then re-charging them again.
Though it’s a fairly large charger that typically plugs into the wall, Zanflare also includes a car adapter as an on-the-go option. Plus, a USB output lets your rechargeable batteries serve as a portable power bank for other devices.