XTAR C4‑AA Charger 4 bays — Type C

Most gear built for AA batteries expects a steady 1.5V output for the whole discharge curve, which a normal 3.7V lithium cell simply can't deliver without a built-in voltage regulator doing the conversion internally. That's the whole point of XTAR's 1.5V lithium AA line, and the C4-AA is the charger built specifically for it: four cells at once, over USB-C, done in about two hours rather than the much longer times typical of older NiMH AA chargers.

Each of the four bays runs independently at 0.5A, so the charger isn't just splitting one shared current four ways, every cell gets its full rate regardless of how many bays are occupied. Power comes in over a single USB-C port rated DC 5V/2A, and the cable is built into the unit itself rather than a separate accessory. The housing is ventilated by design, keeping the cells running cooler during a full charge cycle than a fully sealed housing would.

Specifications

• Four independent 0.5A charging bays
• USB-C input, DC 5V/2A, built-in cable
• 78 x 65 x 16mm, about 33g
• XTAR 1.5V lithium AA cells only, not standard NiMH or alkaline

It's worth being precise about compatibility: this only charges XTAR's own 1.5V lithium AA cells, not standard NiMH rechargeables and not disposable alkaline AA batteries, both of which use entirely different charging profiles the C4-AA isn't built to handle. Attempting to charge the wrong chemistry in a lithium-specific charger isn't just ineffective, it can be unsafe, so the distinction matters beyond just getting the right runtime.

For anyone who also needs AAA-sized cells, whether on their own or mixed in with AA in the same charging session, the XTAR LC4 covers both sizes together rather than needing a second dedicated charger. Kenya's 240V mains supply and the USB-C charging path here mean the C4-AA works equally well plugged into a wall adapter or run off a power bank during a blackout, useful for keeping camera or remote batteries topped up when the grid itself isn't cooperating.