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will check that for sure i was impressed with the 30Q s as battery would barely get warm after 2 mile hill climbs or long stretches of WOT. others were claiming GA batteries were getting hot under similar conditions.for a long time now tho ive been only using max for short blasts on hills...

thanks vfr.yes ive noticed the lcd voltage drops more than it did months ago when pulling high amps.will have to wait an see if they will all charge up to 4.2v and if this improves.Again tho how can less than a years use wear out a battery.im sure they are genuine 30Q cells as claimed by the...

Thanks for all this info Neal. Not switching the battery on when charging has brought this about i guess.Its never been balancing.Then once i found out it should be on there was some too large imbalances in place for it to rectify itself. Its such an important point but neither any battery...

i believe it has load resistors..7 things that look like fets from the bottom is all i can see of them.this also has 2 thin white wires going to the on/off switch.the charging info sheet talked of giving the battery a balancing charge every now and again leaving for 12 hrs after charging...

the charger info from electroncycles suggests its a balancing bms,as it says to balance the battery every once in a while by leaving it on for 12 hrs after charging complete. When i contacted them recently they said the charger may not go on and off during balancing as its not sensitive to go...

nice one neal ill try this while the batterys 'flat' get them all up to 3.45v .then see if they all reach 4.2v together on the full charge.when you say pin outs on the bms you of course mean the 16 wire plug that goes INTO the socket on the bms. just double checking.thanks

now ive ridden the bike til the LVC and rechecked the voltages it doesnt look so bad.12 cell groups between 3.35v & 3.45v. only 2 at 3.07v & 3.16v. cant find anywhere a full detail of how to do this mobile phone charger method to bring up individual cell groups. Anyone?

thanks sturmy.So is this device u used the same as what vfr was explaining to make in his reply. So do you drain each of the higher cell groups down to the lowest ones voltage one group at a time. Is this better than trying to use the mobile phone charger method to bring the low ones up?

Thanks vfr .This is probably childs play to a expert like yourself, but for me i wouldnt have a clue what im doing or looking for. Is this device to test the battery cells for whether they are worn out or simply out of balance? I have 3 36v batteries ,they have had years of use and all the cell...

thanks vfr ,that doesnt sound easy ,how on earth do i put it under load tho whilst performing fiddly testing with a meter,i can see a recipe for disaster in the making. It was from a reputable uk vendor..Electroncycles. They say enough on their site about genuine 30Q, GA cells only used in their...

Hi further to a previous post. Ive now opened the 14s5p 52v battery (11mths old)and checked the voltages of the groups of cells .battery was fully charged ,left on charger for 12hrs. 4.2 4.2 4.1 4.0 4.0 4.0 4.1 4.2 4.2 4.2 4.0 4.1 4.2 4.2 To recap the LVC was 41v ,it would run to that.used to...

A thin coat of solder on one leg of the shunt,not too much,a quarter of the shunt.this will raise the max amps by 4 or 5amps. you DONT want to go over 20amps. the smallest controllers should all take that. i bought a spare small 250w kt controller and thats factory rated 20amps .do you have a...

I can vouch for d8veh s..i mean vfr s advice. a blob of solder really makes a difference. it transformed my wifes 200w rated rear hub motor into pulling 800 watts according to the watt meter.no problems at 19amps.she can get that with the throttle.have you got a throttle.if not the controllers...

So its not a simple battery on off switch then? needs to be on when charging in the future or its not balancing correctly. if the display is the accurate voltage and the dvm is out thats good ,but the dvm at least shows the batts full charge is lower than the charger output by .6v. maybe future...

yeah looks like my 2 dvm's are reading a .5 volt low. the two 36v batts and chargers match. the 52v batt however is .6v lower than its charger output after long balancing charge. the bike display says half volt higher 58.4v which it pretty much what it showed when battery was new.

Thanks neal,how do i raise any that are low .i know how to check the voltage on them but no idea how to manually raise one if a 24hr on charger hasnt managed it. ive always understood you should have the battery OFF when charging. With the battery off.reads 58.6v at the terminals with the...

yeah im gonna set it to 44v but first to leave it plugged in to balance for 24hrs .so far 10 hrs of balancing hasnt raised the voltage a jot,still 58v.half a volt less than the chargers output.

will do that tomorrow.ive done it once before on a 36v because it wouldnt charge much beyond 41v. they were all the same. now ive just discovered that batterys charger only goes to 41.5v. thanks

the controller was programmed by electron cycles for the 52v at 41v LVC.when i questioned this low setting they said it would do no harm and it was to allow a little bit more range. yes i did notice it would only make another cpl miles or so between 45v and cutting out at 41v.but as i was always...

hi danial.it only happened yesterday for the first time.i hadnt used it for cpl weeks.im in the habit of keeping it near fully charged when not in use and when i charge it i often leave it on for hours after full charge is reached to ensure balancing.it always charges to 58.2-58.4v. i know its...