The Pilot InstaBoost 400-Amp Car Battery Jump Starter is part of the ... Reserve capacity estimates how long the Jump Pack can be used to power other electrical equipment such as charging ...

There are a small handful of old tubes that need an impressively low voltage to work, though, and [J.G.] has put a few of them to work in this battery-powered audio tube amplifier. The key to the ...

This portable car battery jump starter kicks out up to 6,000 amps of peak current and is safe to use on all gas-powered engines, select diesel engines, and any 12-volt boats, RVs, ATVs ...