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What's a good balance charger for charging in series


#1

Hi guys me again!

What’s a good inexpensive balance charger that I can get for charging batteries in series?
And could someone tell me what type of connectors are on these battery’s and what harness I would need for putting them in series as well as any other leads I may need?

Many thanks


#2

The Imax B6 is a very popular balance charger


#3

Those leads are HXT 4mm.


#4

I would also suggest getting the IMAX B6 but the version 2. Here is a link. With the V2 you don’t need a power supply, just plug it into the wall.


#5

I don’t recommend charging multiple packs in series but if your going to do that then you will need a series y-cable for the main leads and you will need a series adapter for the balance leads. Basically the charger will need to see your two 3s packs as one 6s pack and your charge settings would be for a 6s lipo at 5 amps for 1C charge rate.
A less complicated way is to get a multi bank charger. I run dual packs in series myself but I charge them separately with a dual back charger. There not very cheap though. I think I paid about $120 for mine.


#6

OK great thanks. Where would I purchase a duel bank charger from? UK based if possible.

Thanks


#7

If you want to save money, make a harness so you can balance charge as one big battery. Otherwise spend some money on a dual pack charger.


#8

I use an Imax B6 to charge two 3s 5000mAh packs in series.
relevant thread

The Imax B6 is a 50W 6S charger, at 6S it delivers little over 2A, so it takes me approx 2.5h to charge the packs, which is no biggie because I swap out packs so there’s always a fresh pair waiting.


#9

you are not really charging the full 5000mAh each time are you? If so what is your cut off voltage for your batteries?
I start to charge mine once they hit anything lower than 3.7V per cell in order to keep them healthy - which means I kind of use only half of the actual capacity.
If it takes you 2.5h to charge them you are draining them too hard!


#10

http://m.ebay.co.uk/itm/Ultra-Power-UP120AC-DUO-120W-LiPo-LiIon-LiFe-NiCd-NiMH-Lead-Acid-Battery-Balance-/131751615079?nav=SEARCH


#11

Great thanks! So with this I can charge two battery’s separate right?
Can’t seem to source the imax one mentioned everywhere us out of stock so looks like the more expensive one!


#12

This is the same charger that I’m using. It charges 2 packs separately and simultaneously.


#13

Here’s another one


#14

https://www.amazon.co.uk/gp/aw/d/B012G0248W/ref=pd_aw_sim_sbs_21_2?ie=UTF8&dpID=51qpznWqH8L&dpSrc=sims&preST=AC_UL130_SR130%2C130&refRID=N0FEFTG86QK8Q9KTNC3J


#15

This one looks like the best. Capable of 100 watts on both banks
https://www.amazon.co.uk/gp/aw/d/B017Y2ZBBO/ref=pd_aw_sim_sbs_21_2?ie=UTF8&dpID=51tDZ60stcL&dpSrc=sims&preST=AC_UL130_SR130%2C130&refRID=4VTY2YVYXAG8B1JCZV56


#16

I was bored this winter and ran a few discharge tests which turned op 3.6V as an ideal cutoff voltage. Below 3.6V there really ain’t no juice left.
So for all intents and purposes I am charging and discharging the full 5000 mAh.
My watt-meter confirms after a ride and my charger concurs after charging.


#17

Oh wow did not know that - always just assumed that there was quite some unused capacity in mine. I should start paying attention to the mAh shown by the charger and keep riding them until 3.6V - thanks for the graph!


#18

Charging a 5000mah pack at 1c takes a charger that can do 5 amps at 6s.
A 100 watt charger will do it and will fully charge a 6s/5000 pack in 1 hour or less


#19

Some brands of batteries are more robust than others.
I’m using Zippy’s and I try not to go below 22.2v just to be safe.


#20

Thanks great help :slight_smile: