Acebeam unveils 6,400mAh 21700 battery with 22.4 Wh and USB-C charging

AB21CP6425 is the name of Acebeam's new 21700 cylindrical battery, and it offers a particularly high capacity. The battery is rated at 6,400 mAh, or more precisely, 22.4 Wh. That is slightly lower than expected, since the images indicate that the cylindrical cell operates at 3.5 volts. This makes it only slightly larger than Nitecore's 6,000 mAh NL2160HP battery, for example, which operates at 3.6 volts and therefore offers 21.8 Wh.

The energy density is still very high, since Acebeam has reserved part of the cell's housing for a USB-C port and the charging electronics. In theory, even more would be possible. So far, the AB21CP6425 has only been shown as part of the launch of the P20 Mini flashlight. The battery can also be charged directly inside that flashlight. In principle, this makes it possible to carry spare cells without also carrying a cylindrical battery charger. Acebeam had already told us during our visit to the company's headquarters in Shenzhen a few weeks ago, that it had managed to build cells with higher capacity. However, the company was not yet ready to say when the cell would arrive.

As a result, the AB21CP6425 is not yet listed as an individual cell in Acebeam's online store. We currently assume that the company will initially focus on shipping the new rechargeable cell mainly with flashlights. Exact technical specifications, especially the length, are therefore not yet available. For now, the largest 21700 battery still available individually from Acebeam remains the AB21CP56, with around 20 Wh in the 21700 format and a more typical 3.59 volts, or 5,600 mAh. It costs around $22 as a single cell but does not have a native USB-C port.