battery recommendations

[ebike tal]

hey, looking to buy an ebike battery, 1000w 48v and at least 17ah, it can be without a case and not a well known brand
attach a link if you can
thanks!

 

[ebike tal]

hey, looking to buy an ebike battery, 1000w 48v and at least 17ah, it can be without a case and not a well known brand
attach a link if you can
thanks!

the cheaper the better

 

[mikecollins11]

Following! Also need to get one for my baby.

 

[Benjahmin]

What do you mean 1000w?
I'm guessing you have a large '1000w watt' direct drive motor?
Cheap large batteries are available and are usually rubbish - even dangerous.
You get what you pay for. If it has unspecified/unbranded cells it will disappoint and will not deliver the current needed for those types of power hungry, inefficient motors.

 

[wheeliepete]

the cheaper the better

As you are looking for a bargain you have prob. spotted these. PLEASE DO NOT BUY, they are not suitable for your use.

Lithium Ebike Battery 48V 28ah Battery with Charger, for 1000w Electric Bike | eBay

After the combined capacity :28000mAh (28Ah). Combination :13 Series 3 and. Battery Type :18650.

www.ebay.co.uk

Lithium 48V 36AH Ebike battery pack 100w hgh power + charger new | eBay

After the combined capacity: 36000mAh (36Ah) Battery.

www.ebay.co.uk

Contact https://ebikebatteries.co.uk/ who will build you a good safe battery pack.

 

[vfr400]

Not all batteries are born equal. There are important parameters that you need to consider. You start by looking at the label on your motor controller to see what the maximum amps are that it will deliver, then you need to add at least 5 amps to it for headroom, so for a 25 amp controller, you need a battery that can provide 30 amps continuous. Look at the battery listing to see what they say is the continuous current. Make sure you're looking at the maximum continuous current and not the maximum current.

If you under-specify the battery, it won't last 5 minutes, and you'll soon be in the position of needing to buy another one.

 

[ebike tal]

Not all batteries are born equal. There are important parameters that you need to consider. You start by looking at the label on your motor controller to see what the maximum amps are that it will deliver, then you need to add at least 5 amps to it for headroom, so for a 25 amp controller, you need a battery that can provide 30 amps continuous. Look at the battery listing to see what they say is the continuous current. Make sure you're looking at the maximum continuous current and not the maximum current.

If you under-specify the battery, it won't last 5 minutes, and you'll soon be in the position of needing to buy another one.

thanks
are you sure i need the battery to be more amps than the controller, for example i got an 30 amp controller, will a 20amp battery will be fine?

 

[Jonah]

Please be aware that the current draw in amps is different to the battery capacity measured in AmpHours. The first parameter determines if the battery can supply the controller / motor the current it requires, the second how long it can supply that power for.

 

[wheeliepete]

are you sure i need the battery to be more amps than the controller, for example i got an 30 amp controller, will a 20amp battery will be fine?

The continuous current is normally limited by the BMS, so a 48v 17Ah battery is fine, but the BMS needs to be able to supply a minimum 30amps continuous ideally 35amps to match or exceed the max. draw from your controller. This info is often missing from the ads of cheap batteries, so asking the seller for the spec of the BMS along with the brand and model of the cells inside the pack is a good indication of whether the seller knows what they are selling, which may do not.

 

[vfr400]

thanks
are you sure i need the battery to be more amps than the controller, for example i got an 30 amp controller, will a 20amp battery will be fine?

I'm very sure. You need a battery that can give 35 amps continuous or more.

 

[sjpt]

I'm very sure. You need a battery that can give 35 amps continuous or more.

and don't forget what Jonah said above: do NOT confuse a battery that can deliver 35 amps with a battery with capacity 35Ah.