Now you've done it. It said no warranty if label is removed.
They don't want people looking inside and decoding numbers and find out the truth that they are dishonest with the total capacity.
Even worse now. Snipped the strap to not put any stress on the cells. Code is the same on all four. Not seeing any other markings on them.
The front of your wrapper is the same as mine, but on the back of the wrapper is a stamped printed code. I think this has to do with the date and battery manufacturer. I bet the stamps on the back our different.
I'm discharging all 4 cells at 1A rate. So far it's drained about 1228mA over 74 minutes and sits at a cool room temperature of 22C. Voltage is 4.64 under the 1A load, and was at 5.12V without a load before I started discharging. It dropped to 4.92V inner initial load.
I'm almost at the estimated capacity your pack was showing and still going strong.
I'm guessing you have a bad cell or one cell way off balance, that's the problem with the older Ni-MH and nicad packs. When I was a teen we raced RC 1/10th scale cars with nicad packs, of one cell died we knew it from the decreased run time. We could always recover the pack by replacing the bad cell, but it would never be the best pack for a race so it became a practice pack.
I have it set to stop at 4.1V since I don't know how well these cells are balanced, or if it was properly trickle charged and topped off. I'm guessing probably not since it was last charged with the fluke 96B nicad built in charger.
When it stops at 4.1, I will drain more at 300mA current again to 4.1V.
I'm going to charge it at 1A also, well maybe I will start at 2.5A charge and monitor the temperature. My charger has an external temp monitor and I have it set to turn off if the pack reaches 32C durring charging.
I did discover tonight that the temp monitoringndoes not monitor during discharge, only when charging doesmit monitor and fail safe if it hits the set temperature.
I contacted the manufacturer and they confirmed it will handle a 1C charge rate at 4.5A, but also hinted that I should charge it at 500mA to 1A. I guess they don't have faith in the packs they sell.
At the time of writing this it's currently at 4.53V, with 1645mA estimated drained over 100 minutes, still draining 1A current.