Sourcing batteries

[The Maestro]

Originally Posted by Tsnafu

Why not buy another one from Bob?

- Online Shop

36v 10ah £210 free postage

I may well do that. I hopefully won't need one for a while anyway.

[Tiberius]

Originally Posted by droo

I was thinking of getting a Phoenix Racer 4840 or 3640. My commute to work is approx 6 miles each way and relativly flat with a mile or so steady climb on the way there.

So Ideally I need a range of about 20miles to make sure im ok !

If I have done my sums right than I recon I might squeeze it on 48v 10AH but would liek a little bit more for compfort !

Droo.

So that's 480 Watt-hours for 12 miles, or 40 Whr/mile. I take it you are thinking of doing a 20 mph wheelie all the way . Seriously though, ask around; I think most people's figures for Whr/mile are less than a third of that.

Nick

[droo]

Call me thick but are you saying that the battery I have picked should more that suffice ?

Droo

[Tiberius]

Droo,

It depends on the particular bike, and how you will ride it, and I don't know those details.

But I use 15 or 16 Whr per mile for a round trip that includes a long hill. I'm probably on the high side as I'm using the motor power all the time. I suspect the norm on here may be more like 10 to 12 Whr per mile - perhaps others can contribute.

Wouldn't like to see you buy more expensive battery than you need.

Nick

[The Maestro]

I'd check with other Crystalyte users. These motors are extremely fast and powerful but use a lot of current and are not that efficient.

[Footie]

Originally Posted by droo

I was thinking of getting a Phoenix Racer 4840 or 3640. My commute to work is approx 6 miles each way and relativly flat with a mile or so steady climb on the way there.

So Ideally I need a range of about 20miles to make sure im ok !

If I have done my sums right than I recon I might squeeze it on 48v 10AH but would liek a little bit more for compfort !

Droo.

Why do you need a 48v battery?
I live in hilly North Cornwall and I have a Cougar Mountain Electric Bike fitted with a LiFePO4 battery.
I get a range of about 20 miles - it's only a LiFePo4 36v 10ah.
I would say a 36v 10ah would do what you want and will be cheaper too.

If you’re interested, this is a link to a thread I ran about upgrading my SLA batteries to a LiFePO4 battery.

Dilemma with replacing my SLA batteries

Link to my picture site about where I go with the bike.

Flickr: skmiles' Photostream
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