Comparison Extra Digital BM400 vs Extra Digital BM300

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	Extra Digital BM400	Extra Digital BM300
	Outdated Product	from $62.76 up to $73.64 Outdated Product
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Main	The purpose of the additional USB output is to monitor the operation of the charger using software on a PC. The software CD is included.	Compatible with many types of batteries. 4 independent channels. Charging current adjustment. Information display with backlight. Movable negative contact. Checking the remaining battery capacity. Measurement of internal resistance of batteries.
Batteries charging
Charging slots	4 шт	4 шт
Supported types	Ni-Cd Ni-Mh Li-Ion	Ni-Cd Ni-Mh Li-Ion
Size	AAA AA 10440 14500 16340 (CR123) 18500 18650 26500 26650	AAA AA 10440 14500 16340 (CR123) 18500 18650 26500 26650
Specs
Operation indicator	display	display
Independent charge channels	4 шт	4 шт
Min. charge current	200 mA	200 mA
Max. charge current	2000 mA	2000 mA /for 2 channels/
Charge current (all channels)	1000 mA	1000 mA
Number of settings	7 pcs	7 pcs
Drip charge	/only for Ni-CD and Ni-MH/
Min. discharge current	200 mA	200 mA
Max. discharge current	1000 mA	1000 mA
Features
Capacity measurement
Overcharge protection
Preliminary discharge
Capacity recovery
Residual capacity check
Polarity test
Fault detection
USB output charging gadgets
Overheat protection
General
Movable negative contact
Mains plug on cable
Dimensions (HxWxD)	158х100х45 mm	152x100x40 mm
Weight	552 g
Added to E-Catalog	august 2019	april 2016

Fault detection

A diagnostic system capable of detecting faulty batteries, disconnecting them from power and notifying the user. The fault detection function is useful not only for checking the performance as such: a battery malfunction that is not detected in time is fraught with equipment damage, and in some cases even fires.

USB output charging gadgets

The ability to use the charger to charge portable electronics - smartphones, tablets, players, etc. As a rule, for this, a USB port is provided in the design, for connection to which an appropriate cable is required; in fact, you can charge from such a device not only mobile gadgets, but also any equipment that can be powered from USB. True, it is worth noting that some manufacturers do not recommend using third-party devices for their equipment if they are not officially approved.

Mains plug on cable

Chargers with a plug for connecting to a socket on the tip of the mains cable. Models with a plug on the wire provide freedom of placement of the “charger” (especially in cramped free space near the outlet). So that the cable does not get tangled at hand, in many models it is made removable, which makes it easy to store the charger.