Posted 12 November 2023

Giant electric bike

Ought the wife a Giant Entour 2+ electric bike about 3 years ago, it's done about 500 miles and you guessed it, battery is caput!!
Bought a Giant instead of cheapo Chinese thinking getting quality but sadly not the case, always followed the care instructions, battery always stored inside as weather gets colder etc.
New replacement is £600 which is total rip off... Get a battery for house solar for that. Question, does anybody know of or heard of workaround???

Thanks for reading
Ken
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  1. Pandamansays's avatar
    When I researched electric bikes, I concluded that 500 miles over 3 years is not nearly enough mileage to support a healthy battery. They need to be used regularly or the battery will suffer and the life of an electric bike battery is only around 5 years anyway.
    EndlessWaves's avatar
    That's an unusual claim for lithium ion batteries, can you link tests that show that?
  2. wayners's avatar
    Fuse inside the battery that can blow. Mine blew a couple of weeks ago as I plugged in charger. My fault. Was easy to replace as a standard car fuse..

    You can also test batteries and chargers so take it to e bike shop or local bike shop for advice.
    One of the problems with bought electric bikes is the lack of parts and ability to repair them, so I stick to kits and fit myself.
    Plenty of parts and batteries.

    If you want a built bike look up woosh bikes based in UK.. Great customer service and parts available.

    I've done 600 miles in 4 months with my current kit costing £380 (edited)
  3. Mark_Hickman's avatar
    Im pretty sure a solar battery is like 2k to ridiculous amounts if you want a big one, although i agree 600 for a bike battery is a robbery as are the house batteries.
    I wonder if you could dismantle it and rebuild it yourself testing parts, have you searched youtube ? (edited)
    Firebladeade's avatar
    Author
    I have Mark, it's a monumental job, the battery cartridge is a complete rubber type resin completely surrounding each cell, the chap I saw had a dustbin bag full of shavings
  4. AMaky's avatar
    I take it you didn't research replacement parts and maintenance costs before buying? (edited)
    Firebladeade's avatar
    Author
    Truthfully no, I did look at replacement battery's at the time and they were around £240 at the time, as the market in cells has grown so has the price,
  5. Humanoid_H's avatar
    Sometimes batteries can be 'reset' by draining completely and then recharging. If you have a way of removing and fully draining the battery, and then giving it a long charge, It might hold its charge again after. If you're lucky. (edited)
    Firebladeade's avatar
    Author
    Tried that, no joy I am afraid
  6. MaverickUK2016's avatar
    The battery cells usually last well if used properly. The issue usually is the small circuit board within the battery casing which the power supply plugs into. I guess pullingit in and out causes movement and so........ mine had a dody joint which I resoldered and all was good again. So its well worth trying to fund a DIY "expert" who can check circuits. Its really not rocket science and a multimeter is king...but we have so little faith in ourselves these days. (edited)
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