18650 Battery

jonnyboy66uk
jonnyboy66uk Posts: 260
edited March 2011 in MTB buying advice
Hey all,

Just bought LED torches and now i want some quality 18650 cells. I have two Ultrafire 3600 mah but i have read that the senybor and asucell equivalents are far better. has anyone got any experiance with them...

Comments

  • bamba
    bamba Posts: 856
    i got the seller to swap my ultrafire 3600 after reading about them, got some 3000mah asu instead, better only really noticable in high power stuff probably, mce or p7, good lap top cells are better, see the new what lights disscusion
    My Trance
  • uk_stretch
    uk_stretch Posts: 50
    Been using Ultrafire 3600 for some time now; in an Ultrafire P7 (900 Lum claimed) and a MG XPG (450 lum claimed) - not had any problems with either torch - or the 4 batteries. Both torches seem to be about 400 lumens (based on comparison with a MaxD). Both have run times over 2 hrs which is fine for a lid light. They all hold their charge well when not in use too.

    Blew up a set of AA Vapextech 2900 batteries the other day though... but that is another story :P ... smelly!
  • cavegiant
    cavegiant Posts: 1,546
    I use 8 xpg running at 1.4A from 4 ultrafire cells without issue.
    Why would I care about 150g of bike weight, I just ate 400g of cookies while reading this?
  • SunZoomSpark
    SunZoomSpark Posts: 2
    Check DealExtreme. com They sell Ultrafire 3600mAh "actual capacity" 1000mAh" and others which are "actual capacity 2600mAh" I bought some of the "2600mAh" and found the actual capacity was 2300mAh at 1A discharge. Be careful where you buy.
    ASU were brilliant when they first appeared about a year ago. Recent ones have been actual capacity of 2500mAh or so, which is still well above average, but not as good as they used to be.
  • diy
    diy Posts: 6,473
    Most of these capacities are based on 350mA current. Typically as the current increases the mAh output drops. So a cell with 3000mAh at 350mA might put out 2000mAh at a 1.5A current.

    The best cells at dealing with the high current draw are the Japanese brands. Samsung do some 4.3v and 4.35v 18650 cells which have higher capacity than the 4.2v cells (v * a = w)

    http://www.candlepowerforums.com/vb/sho ... p?t=275159

    The AWs are some of the best cheap cells though
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  • SunZoomSpark
    SunZoomSpark Posts: 2
    From my experience, the only batteries that achieve their claimed capacity at 1A discharge are Sanyo 2600 and SenyBor 2800. Panasonic are close behind, followed by Samsung.

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