"Got my BMS on Thursday. Very fast. (less than a week) very good service.
First I had to remove my , not working BMS. Overcharged 3 cells (on the min. side) and undercharged 2 cells (on the plus side).
Than the new Bms installation:
At First, the power leads (minus) and then wire 1 from the white connector.
I numbered the connecting points on the battery so it was easy.

Before I connected wire 2, I did measure the tension and if there was any current between wire 2 and the connecting point 2, so there could not be any mistake.

The new Bms does work very good. After a few ours the battery was balanced and now after discharge and charge again the balancer led’s where all lit at the same time.

Works fine. Very satisfied.
"

"This was my first time ordering batteries from you. I received my batteries in two business days. This is the kind of service you would want thanks HeadwayHeadquarters
Can’t wait till the next time I make a order.
"

"My first contact with Headway Headquarters was to purchase a Battery Management System board to make up my first 24-volt lithium battery pack. I received the board with just ground shipping in a surprising two days.

I had already ordered some 10 ampere-hour lithium cells from another vendor weeks before, with no shipment, so in desperation I duplicated that order with Headway Headquarters and again in just two days I had my cells, spacer blocks and bus bar strips. Interestingly, a half-day after ordering the cells, I decided I needed a Cell Log 8S readout and had just barely placed that order when Patricia emailed me she will include the readout in with the cells to save shipping costs. Talk about responsiveness and friendly consideration - - I was amazed.

What followed was a series of emails back and forth about connecting the Cell Log 8S and implementing the temperature sensing feature of the Battery Management System board I had bought. Jim Delgado’s email responses were immediate - - it was as if I had found a fellow hobbyist in his patience and cooperation. I could hardly imagine how a businessman could be so dedicated to one customer’s needs as this man was.

I felt very fortunate to have found such a conscientious source for equipment in this new-to-me area of technology. I must give HeadwayHeadquarters.com my very highest recommendation as the best place to buy state-of-the-art products for transportation or energy systems.
"

"This vendor is great! I ordered a large quantity of batteries and the stuff to go with them and it was sent out to me within 24 hours. Receive the package-EXCEPTIONAL PACKAGING!!! Customer Service is AWESOME!!! Jim gave me the information I needed to build my battery pack."