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Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,716
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Electric bicycle batteries.
I'm considering buying my sister a second hand electric bicycle that hasn't done many miles but is about three years old. Or am I buying someone else's used up junk? The battery is a 36v15.6ah Samsung advanced lithium ion.
I'm just suspicious of buying anything second hand that has a battery 
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12-11-2021, 10:52 AM
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Registered
Join Date: Jan 2002
Location: west michigan
Posts: 26,496
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My Propella's battery is only a year old...so I can't say how long it will last.
I see on their website that a new battery is $250 Propella arrived today! 
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78 SC Targa Black....gone 84 Carrera Targa White 98 Honda Prelude 22 Honda Civic SI Last edited by stevej37; 12-11-2021 at 11:24 AM.. |
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12-11-2021, 11:19 AM
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Join Date: Jun 2007
Location: Lake Oswego, OR
Posts: 6,056
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I have two second hand specialized e-bikes.
No regrets. |
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12-11-2021, 11:28 AM
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Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,716
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Thanks Guys!
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12-11-2021, 12:30 PM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
Posts: 38,313
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Mr Bill, There are lots of EBike companies in New Zealand.
- I'm sure you'd find a reasonably priced replacement if needed & there are lots of options. What do you know about the bike? Is it a conversion or ready made?
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- Peter |
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12-11-2021, 02:14 PM
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Join Date: Jun 2000
Location: bottom left corner of the world
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Peter it's a Smartmotion E-City bike for sale on trademe.
https://www.trademe.co.nz/a/marketplace/sports/cycling/electric-bikes/listing/3384594238?bof=psjQc3tm  A bit of an old lady's bike, but she is an old lady LOL She takes her fluffy white dog everywhere so she may be able to train it to stay in the basket. |
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12-11-2021, 03:41 PM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
Posts: 38,313
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That looks cool... Note the battery in the rear rack. Really easy to replace with a generic one if needed. Also if anything goes wrong with the hub motor in the rear wheel that's also easy (cheap) to replace. You can just buy a whole new wheel with hub motor.
The bikes with the built in Bosche/Shimano motor & gearbox at the pedals are expensive!
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- Peter |
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12-11-2021, 10:38 PM
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Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,716
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Oh, thanks Peter. You sharing your bike knowledge is much appreciated.
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12-11-2021, 11:30 PM
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Registered
Join Date: Jan 2013
Location: state of wonder
Posts: 495
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Best Advise - Buy a quality piece.
Three years is not much, but be aware. have the battery and motor checked out by a qualified tech. You don't want a former rental bike from the Coast. My eight-year old ebike is officially Too Old. Parts are breaking, parts no longer available. JB Weld and a Macgyver DVD = it's still running.
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_______________________________________________ 45 yr addiction 1965 356 Coupe, '70 914- POS, '74 911- lightweightFUN, '83 SC Cab- 100%AnalogOpenTop. |
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12-12-2021, 12:05 AM
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Registered
Join Date: Jun 2001
Location: Sweden
Posts: 5,910
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My wife just broke 5000 miles commuting with her 36V 10.4Ah electric bike. Battery is still functional, but not as strong as before. She uses roughly 50% of battery on each roundtrip.
Trick is to keep it topped after each use and avoid cycling the battery 100%. (there is no memory effect in Lithium batteries and they wear out from deep discharge).
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Thank you for your time, |
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12-12-2021, 12:41 PM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,832
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Sometimes the battery is just a holder for an array stack of smaller standard batteries.
Take it apart, test all, replace a few, and put back together again. That is true with Prius drive cycle batteries. Cost is a few hundred instead of thousands.
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Meanwhile other things are still happening. |
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12-12-2021, 03:06 PM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
Posts: 38,313
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If you bought one of these you could easily rebuild any rechargeable battery pack that was tired.
The individual cells can be expensive but that depends on their country of origin.  
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- Peter |
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12-12-2021, 07:57 PM
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Join Date: Jun 2000
Location: bottom left corner of the world
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That's quite slick Peter. I tried manually soldering a few 18650 batteries for an aging bike light system and killed them LOL
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12-12-2021, 10:27 PM
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