AGAIN AND AGAIN STB-931 Cordless Phone Battery for Sony

Rating:
Summary: Poor Product
Review: I purchased this battery because it is listed as a replacement for a Sony BP-T31 used in a SPP-S9101 cordless telephone which has a spare battery charging compartment.

The Sony BP-T31 is a 3.6V, 600mAh, Nicad battery
The AGAIN & AGAIN STB-931 is a 3.6V, 700mAh, Nicad battery

When I received the battery, it was dead: it tested at 0.0V - a bad sign.

I put it on charge in the spare battery charger compartment for 3 days - it came up to 2.5V. It wouldn't power the phone.

I swapped it with the Sony battery in the phone & charged it for 5 days in the phone while charging the Sony battery in the spare battery charger. The Sony battery read 4.05V (it's 2 years old). The STB-931 read 2.547V - it still wouldn't work.

The Sony battery continues to work fine but the STB-931 never would work.

The Sony battery is no longer available; this is the only replacement I've found. I needed this one because my spare Sony battery died.

I rotate batteries at every discharge. It's not what the Nicad battery manufacturers recommend but it's what THEY do.

The STB-931 DOES make a nice paperweight.