Learn how to build your own auto cut-off lead acid battery charger circuit for a 12V system. This DIY project will guide you through creating a reliable power supply, ensuring your battery is charged ...

Advanced Design - Our most advanced car battery charger jump starter ever. Featuring high-discharge lithium technology for safe operation in any climate. A rugged and water-resistant enclosure ...

Godox PB690 power supply box adopts CPU control circuit, which has two protection measures: software protection and hardware protection. The shell is made of high temperature resistant nylon ...

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio ...

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio ...

Keeping them between 85% and 25% full can make them last up to 50% longer, but of course, you want your portable battery charger at 100%. Slow charging and discharging also help a lot—again ...