First snowfall in Utah, was looking for an emergency battery starter and found this one at a good price with $20 instant savings. Costco link to purchase Pretty good reviews on Amazon: Amazon link for reference Powered by a rechargeable battery, XPower Powerpack 400R provides up to 400 watts of AC power. It can jump start a car, truck, boat or small RV and includes a built-in air compressor for inflating tires, small sport and camping equipment and more. The system also operates a wide range of DC products. Ideal for power emergencies, XPower Powerpack 400R comes with a built-in emergency light, jumper cables and amber light cover. Integrated AM/FM radio and digital alarm clock provides access to music, talk radio and news. This has an AGM battery, they seem to be good for this type of application: http://www.windsun.com/Batteries/Battery_FAQ.htm said:AGM's have a very low self-discharge - from 1% to 3% per month is usual. This means that they can sit in storage for much longer periods without charging than standard batteries. |

