E-bike battery - upgrading capacity a bit

[halfpenny]

I want to increase range by upgrading my battery to one of a larger capacity using the same motor controller and hub motor. If, for example I upgrade from 10Ah to 15Ah battery (same voltage), will that impact my existing controller. I would have thought no - a bit like putting a truck battery on a car. More reserve, longer charge time, but otherwise no bad effects. Or have I got this completely wrong?

 

[Benjahmin]

So long as you keep the same voltage, upgrading the capacity of the battery will have no detrimental effects.
What you may want to look out for is maximum current. Every battery has a maximum current it is able to deliver without damage. Ideally this maximum current capability should be slightly larger than the maximum current of your controller. If your controller is rated at 7Amps, it is probably 14A max. So a battery capable of delivering 16+A should be fine.

 

[saneagle]

I want to increase range by upgrading my battery to one of a larger capacity using the same motor controller and hub motor. If, for example I upgrade from 10Ah to 15Ah battery (same voltage), will that impact my existing controller. I would have thought no - a bit like putting a truck battery on a car. More reserve, longer charge time, but otherwise no bad effects. Or have I got this completely wrong?

We can give you more precise information if you tell us which bike and battery you have.

 

[halfpenny]

Thank you Benjahmin. I doubt I shall push the motor any harder since I use mostly pedal power.

 

[halfpenny]

Saneagle, I have Swytch gen 2, which has been satisfactory over 3000+miles, but the battery is now tired.

 

[saneagle]

Saneagle, I have Swytch gen 2, which has been satisfactory over 3000+miles, but the battery is now tired.

OK. My usual advice when you need to spend any money on a Swytch kit is to keep the motor and chuck everything else, then get yourself a decent controller and battery installed on the downtube or rack. Swytch kit is fine if you want a lightweight kit for city riding snd short commutes without hills or if you're not very heavy. Both the range and amount of assistance are pretty low, so if you find either of those lacking, do what I advise.

 

[Peter.Bridge]

If you want more power as well you can upgrade the battery from 36V to 48v, if you follow @saneagle s advice - just get a dual voltage 36/48V controller ! Lots of people here have done it
Is there room on the downtube for a battery ?

 

[halfpenny]

Saneagle, thanks for the reply. As I said, the Swytch kit has suited me, both in range and assistance. I will be converting to a frame mounted battery. Would you kindly make an ebay suggestion for a 10-15Ah conversion. That size will be more than sufficient given that the Swytch battery is only 5.2Ah

 

[Peter.Bridge]

36V13Ah HL-I Down Tube Lithium-ion E-bike Battery

1.Technical Data 2.Warm tips*Please read the instruction manual carefully after received the package, this will help you to use the product effectively.*Battery delivery cost much more than ordinary goods, in order to reduce the return shipping cost, please make sure: battery and motor should...

www.yosepower.co.uk

Slider for Hailong-I Battery / or with Integrated Controller

1.Packing Listcontroller x 1 2.Warm tips*Shipping from China takes 10-20 working days.*Please read the instruction manual carefully after received the package, this will help you to use the product effectively.*If you want to return the product, please return the complete product as soon as...

www.yosepower.co.uk

DASHI C500 Display / KT LCD3 Display

Technical dataModel: KT LCD3 / Dashi C500Rated voltage: DC48V / 36VFit for: KT display is fit for KT controller. Dashi Display is fit for Lishui Controller.Weight: 0.2kg / 0.15kg Packing ListDisplay x 1Warem tip:*Shipping from China takes 10-20 working days.*The all displays have own protocol...

www.yosepower.co.uk

Make sure you get correct display to fit your controller

There is a 250W version (legal - limited to 25 km/h) or a 350W version with the better Lishui controller (but not legal for use in UK)

You can also get the KT controller and display and a matching battery from sites like PSW Power

Electric bicycle ebike Battery Hailong G70 G56 Pack 48V 36V 17.5AH 15AH 20AH 13AH Bicycle Lithium ebike Battery Lithium fits1000W

Electric bicycle ebike Battery Hailong G70 G56 Pack 48V 36V 17.5AH 15AH 20AH 13AH Bicycle Lithium ebike Battery Lithium fits1000W

www.pswpower.com

KT kunteng Electric Bicycle Motor ebike Controller 24V 36V 48V 250W 500W 1000W Brushless DC Sine Wave sensor Controller

KT kunteng Electric Bicycle Motor ebike Controller 24V 36V 48V 250W 500W 1000W Brushless DC Sine Wave sensor Controller

www.pswpower.com

I'm assuming the Swytch pedal assist sensor will just plug in - I think it is just a standard one

 

[halfpenny]

Thank you Peter. I use my Swytch kit for 25-30 miles at a time on the lowest setting, which is sufficient since I mostly use pedal power - for exercise purposes. A simple upgrade will do.

 

[Peter.Bridge]

There is a 250W version (legal - limited to 25 km/h) or a 350W version with the better Lishui controller (but not legal for use in UK)

You can also get the KT controller and display and a matching battery from sites like PSW Power

Actually thinking about it, if you buy through Yosepower, the lishui "350w" controller and display would probably be better then the 250w one The legislation is based on the motor rated power (ie your Swytch motor), not the controller.

All you need to do to make it legal is set the max assist speed to 25 km/h on the display

 

[halfpenny]

Unfortunately Peter, this does not address my needs since I shall keep my existing motor controller. I am looking at a 13Ah, Yose frame mounted battery. I should add that I am in the UK

 

[Peter.Bridge]

I think some people here have managed to use the Swytch controller with a replacement battery, it sounded a bit of a faff. What version are you using ? Have you a photo of the exisiting controller and battery

 

[halfpenny]

Thank you Peter. I have seen references to using another battery with the Swytch motor and controller, but there is no detail. If you can point me to a relevant post I would be most grateful. I cannot see that it is a faff, because the battery has only positive and negative outputs, and I am making a simple substitution, retaining the existing handlebar bag for storage. So long as the battery voltage is correct, I would think the motor controller would not care about the power pack since the controller is already matched to the hub motor.
I am aware of the replacement handlebar mount where the bag is dispensed with, and that may be an option - but it is not relevant to the technical question of plugging a battery of greater capacity into the existing kit.

 

[Peter.Bridge]

This any use ?

Swytch Max replacement battery

I took a Swytch kit with Max battery to a cousin in South Africa. The battery is not working properly. What replacement battery can I get him? Not a Swytch, as I can't have it delivered to South Africa.

www.pedelecs.co.uk

 

[halfpenny]

Thanks Peter. I hadn't found that. I'm going to proceed, and will post again in due course.

 

[Peter.Bridge]

https://ebay.us/m/55brSE ?

 

[halfpenny]

That link is for a gen3 kit, quite different - and quite expensive for an adapter lead and cable tie

 

[Peter.Bridge]

That link is for a gen3 kit, quite different - and quite expensive for an adapter lead and cable tie

Ah ok - think it has a diode in there somewhere !