Fred C (W6BSD)
A couple of months ago I designed a convenient Battery Monitor board with a voltmeter, one Andeson PowerPole connector as well as a USB power connector. This board is suitable to turn any 7Ah, 9Ah SLA or Lithium battery into a convenient power source for indoor or portable operation. For example,...
Fred C (W6BSD)
I often use small 7 or 9 Ah lead acid batteries because they are convenient and inexpensive. For example, my AllStar node at home is plugged to a battery like the one on the following picture With this battery I can continue to transmit for a few hours even when there is a power outage. The...
Suresh Alse
My brand new Lenovo Thinkpad is a beast and is supposed to give up to 8hrs of battery backup. But there was a weird problem. As soon as the battery remaining reached 30%, it used to drop to 6% in a second. When I looked up on google, I found out that I was not the only one facing this problem....