The biggest twist may be 1000mAh but there is the SPINNER which is 1300mAh. At 25 bucks,I find it a great unit. There is also a 650mAh vv pass through with a digital readout that goes from 3 to 6 volts.Also 25 bucks. I have 2 of those as well,and I love them. Not quite as fancy as the Provari,but it does the same job for a fraction of the price.