BTY 9V NiMH 300mAh (Green-Silver)

DSC_7217

Official specifications:
BTY%209V%20NiMH%20300mAh%20(Green-Silver)-info

This is fairly cheap 9V NiMH batteries with a capacity rating 50% above all other batteries of the same type.

DSC_7214 DSC_7216

DSC_7218 DSC_7219

DSC_7220
DSC_7221
DSC_7222
DSC_7223

BTY%209V%20NiMH%20300mAh%20(Green-Silver)-Capacity

They do not live up to rated capacity, instead they are a bit below the typical capacity for NiMH batteries and they are not the same.
The drop on the curves is probably because the cells are not matched in capacity (This will wear down the batteries faster).

BTY%209V%20NiMH%20300mAh%20(Green-Silver)-CapacityTime

BTY%209V%20NiMH%20300mAh%20(Green-Silver)-CapacityTimeHours

BTY%209V%20NiMH%20300mAh%20(Green-Silver)-Energy

BTY%209V%20NiMH%20300mAh%20(Green-Silver)-Charge

To get the best possible charger of the cells I have added a top-off charge (10mAh), this will compensate for small capacity differences in the cells used.


Conclusion

With random variation in capacity, difference between cells, low capacity and bad handling of high current, this is not the best battery around, but it can be used.



Notes and links

How is the test done and how to read the charts
Compare to other 9V batteries: Alkaline/NiMH/Lithium/other