Extra Digital BM300

The brainchild of the Extra Digital brand, also known in the market under the related name Opus BT-C3100, is a versatile field for charging, discharging, testing and remanufacturing Ni-Cd, Ni-Mh and Li-Ion rechargeable batteries.

Wide Compatibility

The device is compatible with batteries of sizes AA, AAA, C and a lot of "digital" battery formats, which is implemented due to the movable "minus". The charger has four independent channels, which means that the device doesn’t care whether it charges one battery or a quartet of different batteries in one sitting. In anticipation of the start of the process, the user is free to choose the amount of charging current in the range from 200 to 1000 mAh, and for the first and fourth seats — also 1500/2000 mAh.

informative

Opposite each slot in the body of the model there are illuminated information screens that display the key characteristics of the batteries depending on the selected operating mode of the device. There are five of them: charging (Charge Mode), recovery (Refresh), capacity testing (Test), discharging (Discharge Mode) and express testing (Quick Test) to determine the ability of the battery to receive a charge. The displays display information about the duration of the device in the selected mode, the amount of charging current, the current voltage value, as well as the accumulated or given capacity.

Winning combination

The built-in mini-cooler is put on guard to protect the Extra Digital BM300 from overheating, which is sometimes criticized in the reviews due to its excessive noise. Other safety features include battery overcharge protection and a polarity check feature that helps minimize the chance of errors when inserting batteries into slots. In the bottom line, the charger rests on three pillars — a winning combination of cost, functionality and versatility.