Any recommendations for faster chargers?

[Joshua Hong]

bought a Emma 3.0 recently, planning using the bike for delivery, customer service said it takes 6-8 hours to charge each battery, any recommendations for faster chargers?

 

[DieselTech]

Buy another set of batteries.

 

[addertooth]

Unless you know the type of cells, and the ratings on the Battery Management System (BMS), then charging at a higher rate can be quite risky.

 

[HumanPerson]

The cells like it when they have a nice cool down time before charging too.
I'm not sayin it don't work, charging right after a hard ride..there are people who do it, just sayin..not good for battery.

 

[Atavar]

Buy another set of batteries.

Or a few batteries

 

[Chris Grilbert]

Hi, I usually charge it at night, the Emma 3 has 2 batteries. Although it's a 3A fast charger it only charges one battery a night. I'm not sure if it's safe to use the charger continuously, the original charger has a fan on it and it didn't get hot after a full charge.But I'm still considering getting another charger.

 

[neutron]

Using a charger that didn't come with the battery is probably not a good idea unless you have the knowledge and wherewithal to do so safely.

 

[m@Robertson]

If you are already charging at 3a, that is probably as fast as is possible. The reason is that the plugs typically used for low-cost, mass-produced DTC bikes like the Emma typically are pin plugs that can't take more than 3.0a to start with (and 3 amps even is a bit of a stretch on those kinds of plugs). It has nothing to do with the battery cells and everything to do with the ability of the plug to handle current.

You can double your charging speed by separating the batteries (assuming they are parallel'd) and charging each with an individual charger. However, separating parallel'd batteries and then reconnecting them introduces a whole new set of risks, the sort of which really do make that something you shouldn't be doing. If the batteries are not parallel'd then this issue does not exist, and you want to use two chargers.

But I wouldn't buy one. Instead I'd choose components you can count on for the long term, and for a safe, high duty cycle. The 185w version of these units in this article is perfect for a 3a charge on a 48v or 52v battery.

An Ultra Reliable Ebike Battery Charger…

How about a charger – quickly adjustable for voltage and current – that is rated for hundreds of thousands of hours of use before it typically fails?

talesontwowheels.com

These chargers are also adjustable for both current and voltage. If you have a 48v system, your max charge is 54.6v. If its 52v, max charge is 58.8v. 80% charge levels - which is what you should be using to preserve battery life - differ for each voltage. Check these charts for specifics on a variety of common ebike battery voltages.

Li-Ion Ebike Battery Charge Charts

Whats an 80% charge on a 48v battery? These charts give answers to questions like this on common ebike battery voltages: 36v, 48v, 52v, 60v and 72v.

talesontwowheels.com

 

[Joshua Hong]

If you are already charging at 3a, that is probably as fast as is possible. The reason is that the plugs typically used for low-cost, mass-produced DTC bikes like the Emma typically are pin plugs that can't take more than 3.0a to start with (and 3 amps even is a bit of a stretch on those kinds of plugs). It has nothing to do with the battery cells and everything to do with the ability of the plug to handle current.

You can double your charging speed by separating the batteries (assuming they are parallel'd) and charging each with an individual charger. However, separating parallel'd batteries and then reconnecting them introduces a whole new set of risks, the sort of which really do make that something you shouldn't be doing. If the batteries are not parallel'd then this issue does not exist, and you want to use two chargers.

But I wouldn't buy one. Instead I'd choose components you can count on for the long term, and for a safe, high duty cycle. The 185w version of these units in this article is perfect for a 3a charge on a 48v or 52v battery.

An Ultra Reliable Ebike Battery Charger…

How about a charger – quickly adjustable for voltage and current – that is rated for hundreds of thousands of hours of use before it typically fails?

talesontwowheels.com

These chargers are also adjustable for both current and voltage. If you have a 48v system, your max charge is 54.6v. If its 52v, max charge is 58.8v. 80% charge levels - which is what you should be using to preserve battery life - differ for each voltage. Check these charts for specifics on a variety of common ebike battery voltages.

Li-Ion Ebike Battery Charge Charts

Whats an 80% charge on a 48v battery? These charts give answers to questions like this on common ebike battery voltages: 36v, 48v, 52v, 60v and 72v.

talesontwowheels.com

thank you! very helpful information!