Here's My Magicshine MJ-858 review, this light was supplied for review by MagicshineUK.
1000 lumens bike light
3 power settings, high, low and flash mode
10 hours run time on low setting
3.5 hours run time on full power
Very compact design, lightweight
Punchy wide beam pattern
Great for on or off road
4.4Ah battery as standard,
Helmet mount option available
More details can be found here.