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Big fat zero I take the risks ,been ok in ten years ,

Kalkhoff endeavour s10 still going strong. Still used 2 or 3 times a week 40 mile round trip commute. s-pedelec 28mph original bosch motor and gears and intuvia diplay all still working. Just went over the 1200 power on hours in the 10 years I have had Which equates to an average of 33...

Spliced into existing wires so can use swytch battery or my own

Hi I took the controller apart few screws to undo and soldered in a new lead .I changed to anti spark XT60 on the batterys as was getting a few sparks connecting my packs up.I made a cople of packs ranging from 8amp/hr to 18amp/hr and just leave them in a brompton bag on the front.

No I have a Bosch pack with faulty Bms which I repaired with new Bms a new Samsung pack and a old Xiaomi pro scooter pack for the Brompton so left the Swytch max intact as I have two Bromptons with Swytch kits

Thats a great bike I have the khalkhoff bs10 endeavor high speed 10 years old now and over 25000 miles on it,Still working 100% and in use a few times a week. I looked at that bike when I got another new bike this year but for similar price went for a Riese and Muller charger high speed instead...

Most balance wires are tiny as even with a big 6 amp charger its going to be split between the cell group so individual wires are not going to see more than probably .5 amp passing through.The bosch battery I replaced with a new BMS had the thinnest wire I seen yet on the cell groups and as...

I think the max battery uses 21700 cells x 10 so the bms will charge each cell to full. I think the cells must be a decent quality as I witnessed 15.5 amp discharge through my swytch controller. I reckon there using the samsung 50s in there pack as the pack is rated at 180watt or 5.0a/h and...

I’ve done it and used the Swytch max battery 5,0 amp hr and the Bosch 11 amp hr both fully charged plugged in at the same time the draw is even until the smaller battery start getting low .You notice no voltage sag as both battery’s are trying to give even voltage .Im currently building a mega...

It doesn’t matter if both battery’s are connected at the same time not good practice but your still only supplying 36v as they in parellel and not series

You can get about 14-18 miles from the max battery. I’m running a Bosch Powerade that stopped working Bms issues .i put a new Bms in it and I have a 11.6 A/h battery that I use in the bag straight into the controller and now get a about 30 miles per charge

There about £499–£599 if you pre register before and wait I have two kits and they work superb

I placed a watt meter between 36v battery made of 10 x 21700 Samsung 50e battery and controller and observed 15.5 amp max current draw and 550watts output on the meter max so explains why some people battery bar fluctuated.I think the max battery has 10x 21700 battery’s in but probably the...

The Swytch needs needs 36v or more no need to drop it done you would get reduced power output.The oled controller shows battery voltage of 41.5 on fully charged battery anyway.

Look here I have some answers works a treat on external 36 v battery’s or makita power tool battery’s https://www.pedelecs.co.uk/forum/threads/21700-10-ah-battery-build-peer-review.45709/

Just bought two holders off eBay and wire them in series and mounted them on a perpex sheet pic attached

update to the battery pack tried with a watt meter max current draw was 15.5 amps and 550watt draw on the watt meter .On my 19 mile each way commute 5.9 amp/hr was consumed each way from the 10 a/h pack.The battery was Luke warm to the touch so happy with that , The 50e are rated at 10 amp max...

This is my new 21700 battery built for my swytch gen 3 which I tapped into the speed controller so any 36V Battery can be utilized . I used the samsung 50 E from fogstar in a 10s2p Format. Whole pack cost me less than a £100. The powers great and so is the range.They are rated at 10A discharge...

Yes I use the makita charger for the two lxt battery's also making a couple of packs from a broken Xiaomi scooter which is 7.6a/h and a broken bosch power pack 400 11a/h so should have plenty of range .

Battery in bag at moment on front extra connector going into speed control