QNBBM balancers are designed to actively transfer energy from the highest charged cell over to the lowest charged cell. A voltage difference of 1V will draw a current of 3A, a 300mV difference will draw 1A. Using these balancers in a high capacity bank with slight capacity differences helps get more usable capacity out of the bank before the lowest capacity cell nears empty by transferring energy into it from other higher charged cells. LED lights on top indicate whether the balancers are in balance with each other, are charging other modules, or are receiving a charge.
There are two types for sale, 12V and 3V.
Voltage range per type:
12V: 9V-15V
3V: 2V-5V
| Model Number | QNBBM-B |
| Battery Capacity | unlimited |
| Power consumption | less than 50mw |
| Battery method | Energy transfer/Dynamic |
| Work efficiency | 94% + |
| Balance current | 300mV=1A; 1V=3A |
| Battery type | Lead Acid, Li-ion, Li-polymer, LTO, LiFePO4 |
Unlimited Mileage Warranty: 3 Months




Tim (verified owner) –
I purchased, but was unable to get any information on or instructions for installing them, so unfortunately I put in for a return.. if I need them, it would be nice to have been able to use them (your website shows for my application, they are necessary). So far have had success when buying batteries and customer service overall with GreenTecAuto. Will recommend their batteries for sure.
James (verified owner) –
I am running two strings of 4 of these equalizers with 8 valence batteries….they are doing what they are supposed to do. Initially had a failure out of the box, but Greentec took care of it. Thank you.