The MH1 is a very good cell and LG in the most are highly rated, I think in the last few years there was only one cell that was a bit of a dog and that was the MG1 which is no longer I believe.

The new Mxx series are also meant to be very good as well as is the very well regarded MJ1.

Edited October 30, 20196 yr by Nealh

Think about how far you want to travel on the bike. More capacity = more money. VFR's suggestion has better quality cells in it and maybe less work as long as it fits your case. The silverfish case may be more work to fit, but has the charger and new battery connectors included.

Think about how far you want to travel on the bike. More capacity = more money. VFR's suggestion has better quality cells in it and maybe less work as long as it fits your case. The silverfish case may be more work to fit, but has the charger and new battery connectors included.

 

This bike was really just a project to see if I could get it back up and running.

 

I knew the square root of nothing but at least now I know that somebody telling the battery is perfect isn't something to be taken at face value

 

I'm perhaps thinking of selling this one and using the money to get a kit to put on my older Raleigh MTB.

 

Then again, this one would be fine for occasional use.

 

Decisions, decisions...

Does this seem too good to be true?

 

US $71.71 39%OFF | 36V 20AH 10S4P electric bicycle battery pack 18650 lithium ion battery 500W high power 42V motorcycle scooter

https://s.click.aliexpress.com/e/BRpaBpPiL

Yes, without looking well dodgy 20ah with only 4 cells 18650 in parallel. Panny's very good GA cell is only 3400mah they don't make a 5000mah cell, no one makes a 5000mah 18650.

Yes, without looking well dodgy 20ah with only 4 cells 18650 in parallel. Panny's very good GA cell is only 3400mah they don't make a 5000mah cell, no one makes a 5000mah 18650.

 

I watched a few videos on YouTube where they tested a variety of 18650 batteries and most were only a fraction of their rated capacity. I'd suspect something like this type of battery may very well be made from the same low grade cells?

 

Also read about the dubious practice of putting new wrappers on old mobile phone batteries and selling them as new...

Does this seem too good to be true?

 

US $71.71 39%OFF | 36V 20AH 10S4P electric bicycle battery pack 18650 lithium ion battery 500W high power 42V motorcycle scooter

https://s.click.aliexpress.com/e/BRpaBpPiL

There are no 5000 mAh 18650s, so the capacity is wrong. Maybe something went wrong with their maths because it looks like the same pack that Aerdu sell as the 10Ah one. Note also the 15A max continuous current, which is too low for you and means crappy cells.

When you have something like this old bike, with no known spec or details etc...it's obviously setup to use 36v but what would occur if say 48v was used instead?

 

Would it simply blow the controller or burn out the hub motor?

When you have something like this old bike, with no known spec or details etc...it's obviously setup to use 36v but what would occur if say 48v was used instead?

 

Would it simply blow the controller or burn out the hub motor?

Quite possibly burn out the controller, the motor is likely to survive.

48V will give 33% more torque and speed. The motor won't have any problem with that.

 

Some 36v controllers can handle 48v and some can't. Controllers don't cost much compared with a battery, so it's always worth upgrading at the same time.

 

Your 36v controller will cut off at 31V when the battery is empty. For a 48v one, it should be around 40v, so there's a danger of running your 48v battery too low. Any 36V battery charge state indicator lights you have will be on all the time because the first one goes off around 37V, which is already too low for a 48v battery.

 

Also, old 36v controllers have rather crude power control. When you go up to 48v, it's better to have more precise control over the additional power.

 

Never buy a cheap controller. It'll work, but your riding experience and control over the bike will be a lot better with a nice one, like Kunteng (KT).