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Archive for April 4th, 2019

“New” Phone Battery

Having an ancient flip phone in need of a battery, I ordered a Kyocera TXBAT10133 battery from eBay. Described as “new” (which, according to the Ebay listing, means “New: A brand-new, unused, unopened, undamaged item in its original packaging”), I was somewhat surprised to see this emerging from the box:

Kyocera TXBAT10133 - not really new
Kyocera TXBAT10133 – not really new

It obviously led a rather hard life before being harvested from somebody else’s obsolete flip phone and is definitely not “new”.

Not yet having a deep emotional attachment to the thing, I set it up for a capacity test:

Kyocera TXBAT10133 - contact clamp
Kyocera TXBAT10133 – contact clamp

Given a very light 100 mA load, it shows about the same capacity as the original battery in our phone:

Kyocera TXBAT10133 - 2019-03-29
Kyocera TXBAT10133 – 2019-03-29

Given the precarious contact arrangement, the glitches near the right end aren’t surprising.

The battery label claims a 900 mA┬Ěh rating, so both have nearly their nominal capacity at such a reduced load. In actual use, the phone has a low battery after a few hours of power-on time, far less than when it was new.

The seller promises a replacement. For all I know, there are no genuinely “new” batteries available for these phones.

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