New charger needed for Magicshine MJ828 battery pack

sparky543
sparky543 Posts: 54
edited September 2014 in MTB buying advice
Well, I dusted my lights off tonight and popped them on charge for tomorrow and I think the charger has gone pop. Does anyone have any suggestions for a half decent replacement charger for these? If it helps, the battery is a 4 cell 18650 arrangement.

Thanks in advance

Comments

  • coulddobetter
    coulddobetter Posts: 812
    Contact magicshine. Sent me a replacement lens .v helpful.
  • gazeddy
    gazeddy Posts: 305
    can the cells be separated or are they soldered together. if they can be separated look at the nitecore intellichargers. if one cell is below 2.5v dont try and charge it. replace all 4 cells or the pack
    I rode what you dug last summer
  • drlodge
    drlodge Posts: 4,826
    edited September 2014
    Measure the voltage across the battery, if below 12volts then there's your problem (LiIon and LiPo batterries have a peak voltage of 4.2 or 4.25volts when fully charged and should NOT go below 3v per cell...4x3v = 12volts).
    WyndyMilla Massive Attack | Rourke 953 | Condor Italia 531 Pro | Boardman CX Pro | DT Swiss RR440 Tubeless Wheels
    Find me on Strava
  • gazeddy
    gazeddy Posts: 305
    not bike light but i recharge my 18650s at around 3.3v(unloaded)
    I rode what you dug last summer
  • CitizenLee
    CitizenLee Posts: 2,227
    gazeddy wrote:
    not bike light but i recharge my 18650s at around 3.3v(unloaded)

    Vaper? :)




    This has reminded me to dig out my MJ880 and give it a charge!
    Current:
    NukeProof Mega FR 2012
    Cube NuRoad 2018
    Previous:
    2015 Genesis CdF 10, 2014 Cube Hyde Race, 2012 NS Traffic, 2007 Specialized SX Trail, 2005 Specialized Demo 8
  • freezing77
    freezing77 Posts: 731
    drlodge wrote:
    Measure the voltage across the battery, if below 12volts then there's your problem (LiIon and LiPo batterries have a peak voltage of 4.2 or 4.25volts when fully charged and should go below 3v per cell...4x3v = 12volts).

    The usual configuration for these battery packs is 2P, 2S therefore the output will not be 4 x 3v. But rather 2 x something.
  • gazeddy
    gazeddy Posts: 305
    CitizenLee wrote:

    Vaper? :)


    yep bit of an obsession now ive lost count of how many mods ive got and long lost count of batteries
    I rode what you dug last summer
  • CitizenLee
    CitizenLee Posts: 2,227
    gazeddy wrote:
    CitizenLee wrote:

    Vaper? :)


    yep bit of an obsession now ive lost count of how many mods ive got and long lost count of batteries

    Haha nice! I'm just using a MVP v2 with NatureVape tank but it's a pretty decent set up. Have yet to delve into mechanical mods though :)
    Current:
    NukeProof Mega FR 2012
    Cube NuRoad 2018
    Previous:
    2015 Genesis CdF 10, 2014 Cube Hyde Race, 2012 NS Traffic, 2007 Specialized SX Trail, 2005 Specialized Demo 8
  • drlodge
    drlodge Posts: 4,826
    freezing77 wrote:
    The usual configuration for these battery packs is 2P, 2S therefore the output will not be 4 x 3v. But rather 2 x something.

    Ah, right, yes so a reading of between 6v and 8.4volts.
    WyndyMilla Massive Attack | Rourke 953 | Condor Italia 531 Pro | Boardman CX Pro | DT Swiss RR440 Tubeless Wheels
    Find me on Strava

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