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Battery choice question

Old 04-02-21, 08:51 AM
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Tpsfoto
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Battery choice question

I am considering one of two kits for my bike.
1- has 36v 5.4amps
2- has 24v 5.2amps

which will give a better result on a front wheel 250w motor?

this is the new 2020 Hilltopper Sprinter vs the Leeds 250 kit
Hilltopper has a better battery mount system and much more sleek in the fact wires are true to size and not sloppy....Leeds gives so much wire that people wrap around frame....Hilltopper battery locks with key to prevent a quick theft, Leeds does not.
weight about same....Leeds has better warranty two years and seems like a better company. Prices are same, but Leeds accepts PayPal so I can make monthly no extra charge payments. I do not want a pas only a throttle to give me power for hills....when I want it.......so Swytch is out.

thanks
Larry
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Old 04-02-21, 10:34 AM
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Neither one. 24V was obsolete 20 years ago and 36V is circling the drain. I don't know anything about either of these systems but they sound like time wasters. If Leafmotor, EM3EV, GRIN, to name three have anything in your power range then do a comparison. In Europe where 250W is the legal maximum you can get quality systems at that power level. In the US where 750W is the legal maximum, 250W systems are being put out there to pick off the unwary. You need torque arms for front wheel installation. People will tell you you don't need them for <250W. I don't agree. A torque arm is cheap insurance. TL;DR: e-bike systems need to be over-everything to be practical. You need twice as much battery capacity and motor power as you are actually going to use. It is frustratingly counter-intuitive but if you buy a 250W system you will be using the motor and battery at their limit all the time. This will wear things out quite quickly.
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Old 04-02-21, 11:26 AM
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Search the posts here. The Hilltopper has a thread or two, and was generally well received and adequate for the intended purpose. Neither will help much on hills and you'll need to be maintain a speed of 8 - 10 mph in order to keep the motor from overheating.
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Old 04-02-21, 02:59 PM
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A few years ago, you could get a decent 500W geared motor kit for $200 and a 36V battery for $300, While battery prices are the same, I don't see any inexpensive motor kits these days. They're all 1000W or higher or they cost $300 or more.

I'd suggest a rear motor kit. A little better as far as safety. You don't want your alloy forks breaking,
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Old 04-02-21, 08:23 PM
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If you are just looking for part time assist then 250w is plenty. My front hub kit gets my tandem uphill while trailering a dog without having to drop out of the largest ring. I have the swytch you mentioned which btw does have a throttle option though I like the PAS.

I can't even imagine how much the power would be on a single bike not pulling an extra 200 pounds.

If you want full time assist then the larger capacity systems mentioned are probably the way to go.
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Old 04-04-21, 09:08 AM
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The lower voltage battery with the same amp-hour rating will have less capacity. This not only means less range, but more frequent recharging. Since batteries are only rated for so many charge cycles this also means you will be replacing it sooner.

The earlier post about those voltages becoming obsolete will matter when it comes time to replace the battery, Choices might be limited.

By the way IMO the best way to prevent battery theft is to take it with you. Mine mounts with magnets and comes into the store with me. I've read articles saying key locks are easy to smash. The thief then buys a replacement shell for cheap.
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