"Under Load" means different things for different cells. Mem backup Li
cells are most often specd at micro-amps for current load. Excessive
current draw for Li cells can lead to immediate failure. In the area
of 2.5v, in-circuit means "Let's get it replaced now."
Emil
W9NM


Jack VK2CJC wrote:
Measure it still connected within the circuit and
with the DC power switched off. If it still reads
3.11 volts then it's probably OK. I start to worry
when they read around 2.80 volts or if they are more
that 5+ Years old.

Thanks for the advise guys. I did measure it in circuit, and out. Same
reading each time. I didn't measure under load which is a damn good idea and
I don't know why I didn't think of that earlier )

Its over 5 years old, so I think I'll replace it anyhow. I'm getting some
peculiar things happening with the display and this set is known for this
when the battery goes low. Its a Yaesu TS711.

--
Jack
VK2CJC
ex- MM0AXL, 2M0AJW & GM7POK
yahoo messenger nickname- vk2cjc
www.qsl.net/vk2cjc
www.qsl.net/vk2ep