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    System (U, Motor, Controller) Efficiency

    Just a little update now that I'm running on Lipo: 1. Efficiency: 10.5 wh/mile 2. Speed: average 24mph 3. Gradient: -14 to +13% 4. Pedaling effort: moderate - high (mixed) 5. Bike Type: Raleigh Mountain bike 6. Motor: vpower 24v 250w motor (unsure who actually makes it or real rating? - see...
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    Cheap 32Amp 12V PSU for LIPO charge -HK PSU went BANG! (UK)

    P.S. I subscribed now! Cheers for the phone call! I could have chatted all day but I didn't even get around to mentioning I'm at work! Er herm - he says posting in the forum!! Ooops!
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    Cheap 32Amp 12V PSU for LIPO charge -HK PSU went BANG! (UK)

    Hey guys! Sorry for the long silence! I haven't been doing much work on my bike recently - cold weather, a 'technical issue' caused by some off roading (puncture on a wheel that needs two people to remove.. joy of hub motors on a frame that's too narrow!) and a general lack of time.. I can't...
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    Had it with Hobbyking products..

    Mine is a commuter bike so spending an hour+ a day watching lipo charge in my shed / garage (I'm not planning on bringing them into my house!) is not an option... I'd rather be inside playing with my 9 month old lad :)
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    Had it with Hobbyking products..

    With one caveat knoxie.. You'll need to be in earshot if you use cheap hobbyking kit!
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    Had it with Hobbyking products..

    Well guys, I think the bulk charging with cell level monitoring is sounding good for the future, but I have just dismantled my charger again and studied the circuit a bit and I think it MIGHT be repairable.. The trickiest bit will be the connector to the LCD that got burnt.. I've ordered 3 FETs...
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    Had it with Hobbyking products..

    Thanks for the support guys... The caps were 25V 470uF but it's blown a diode and another component that doesn't have any readable marks.. It's an 8 pin surface mount chip - possibly an opto couple or a switch mode controller.. I agree that caps don't blow so violently normally.. 3 out of 4...
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    Had it with Hobbyking products..

    Thanks for the support guys... The caps were 25V 470uF but it's blown a diode and another component that doesn't have any readable marks.. It's an 8 pin surface mount chip - possibly an opto couple or a switch mode controller.. I agree that caps don't blow so violently normally.. 3 out of 4...
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    Had it with Hobbyking products..

    Yeah.. And I just noticed that Hyperion charger shipped from China - not likely to buy from there!
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    Had it with Hobbyking products..

    Or I could get a Hyperion for the same money... http://www.ecrater.co.uk/p/12147151/hp-eos-1420i-net3-charger
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    Had it with Hobbyking products..

    knoxie - you must be fairly close to me :) It looks a bit like the HK charger that just blew up but at least it's a local supplier! Jeese... this lipo business is expensive :S
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    Had it with Hobbyking products..

    I might have to look into the Hyperion charger and see if I could charge my 12s2p setup without having to swap batteries to charge them all...
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    Had it with Hobbyking products..

    Cheers guys.. So annoying.. They only show the return address that can accept the particular item apparently and my items can only be returned to China according to the support dept... Other items can be returned to the local warehouse but only if the return address is shown on the RMA page.
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    Had it with Hobbyking products..

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    Had it with Hobbyking products..

    Two items from my first hobbyking order have now exploded under normal use.. How bad is that?! And to top it all, it will cost me more to return the items than they are worth - Please.. Can anybody calm me down and recomend a replacement for my 4x6s Hobbyking charger? This is my chat with the...
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    Cheap 32Amp 12V PSU for LIPO charge -HK PSU went BANG! (UK)

    Hey guys, After my Hobbyking 35A PSU went up in smoke on it's second outing (whilst pulling only 4 amps!) charging my new lipo, I was looking for a new power supply - Just a heads up - there are some HP DL380 G3 server power supplies on Ebay (UK) for £4.50ish at the moment - HP part code HP...
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    ID for this vpower controller? Infineon 12 FET? Keywin /XPD?

    Afraid not - not yet.... Anybody?
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    12s2p LiPo pack kit including 12-channel BMS "Lite" Board

    Just subscribing! This sounds great! I'm waiting on my 4x 6s1p batteries arriving (for a 12s2p configuration) so would be very interested!
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    ID for this vpower controller? Infineon 12 FET? Keywin /XPD?

    Interesting that they have a range! What power can your 18 fet deliver? I was surprised that my 12 FET can deliver 30 amps!
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    First time builder - vpower.hk

    I'm running 3x 12AH SLA... They don't seem TOO upset (it's not a long period at 30Amps - perhaps a few seconds whilst pulling away until the back emf catches up and 3 or 4 minutes up a 15% gradient I have on my way home).. I can't justify binning them and upgrading to lipo just yet.. I'd...
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    First time builder - vpower.hk

    Hey there, I also ordered from vpower.hk - I ordered a 24V 500W package but I'm not convinced that they have multiple products! Mine was drawing 30amps at 24V (=720W) and now I have upgraded the battery to 36V it's still drawing 30amps (around 1kW!) and everything is OK (it's current limited...
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    ID for this vpower controller? Infineon 12 FET? Keywin /XPD?

    Hi guys, Anybody recognise this controller? I was hoping to enable regen braking (for the braking effect more than the regen effect) and play about with the various settings using Keywin / XPD. It looks very similar in layout to the 12 FET infineon controller but I don't see recognisable jumper...
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    VPower 24V 500W kit - TOTAL Newbie..

    Hi guys, With my batteries plugged in I can't exceed about 27 miles an hour down hill (not that I want to go much faster!) due to the back emf reaching the charging voltage of my batteries - great if I want to put a bit of charge in my batteries going down long hills but not so great if I want...
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    VPower 24V 500W kit - TOTAL Newbie..

    On the other hand.. a 5s4p (37v 10ah) lipo pack with charger, psu, and leads would be about £175 :) But it'd be a bit dodgy charging it in my office!
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    VPower 24V 500W kit - TOTAL Newbie..

    So tempted to get rid of the bricks but I need to save up for a while! Lifepo4 would be ideal since I charge it at work but I'd be looking at £300 ish I guess :S
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