$22.99 USD $115.00 USD
1, USB charging or through similar way charging data charger, recycling. Can be charged and discharged hundreds of hours. Life is relatively long, oh!
2, short charging time (charge time is about 1.5 to 3 hours, full power can be used a week or so, (a pack of cigarettes to smoke a day calculation)
4, silent cigarette lighter;
5, no inflatable filling oil