Conrad Energy Endurance NiMH 9V 270mAh

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
[size=+3]Conrad Energy Endurance NiMH 9V 270mAh[/size]

DSC_1083.jpg


Official specifications:
  • Chemistry: NiMH
  • Rechargeable: Yes
  • Voltage: 8.4V
  • Rated Capacity: 270mAh
  • Maximum Charging voltage: 10.5V
  • Internal Impedance: <800mOhm at 1kHz
  • Standard charge: 27mA
  • Quick charge: 80mA
  • Fast charge: 270mA
  • Trickle charger 2..15mA
  • Maximum continuous discharge: 400mA
  • Cycle life: 500 cycles
  • Size maximum: 48.5 x 26.5 x 17.5 mm

Conrad%20Energy%20Endurance%20NiMH%209V%20270mAh-info.png


A 7 cell high capacity NiMH 9V battery.

DSC_1084.jpg
DSC_1085.jpg


DSC_1086.jpg

DSC_1087.jpg

DSC_1088.jpg

DSC_1089.jpg



Conrad%20Energy%20Endurance%20NiMH%209V%20270mAh-Capacity.png


The batteries have a high capacity for NiMH and good performance at any current.

Conrad%20Energy%20Endurance%20NiMH%209V%20270mAh-CapacityTime.png


Conrad%20Energy%20Endurance%20NiMH%209V%20270mAh-CapacityTimeHours.png


Conrad%20Energy%20Endurance%20NiMH%209V%20270mAh-Energy.png


Conrad%20Energy%20Endurance%20NiMH%209V%20270mAh-Charge.png




[size=+3]Conclusion[/size]

This battery has good performance for a NiMH



[size=+3]Notes and links[/size]

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

Kurt_Woloch

Enlightened
Joined
Nov 12, 2014
Messages
290
One thing I notice about the discharge curves is that there's some kind of step in the curves of the "B" battery. If you look at, for instance, the 2 mA curve of the B battery, it steeply falls down to 7.0 V at about 240 mAh, then gradually goes down to 6.5 V until about 255 mAh and then falls sharply again. Unfortunately, I guess this means that the cells in that battery aren't perfectly matched. The first cell seems to have lost all its charge at 240 mAh which causes the first sharp decline. However, the other cells still have some power left and deliver 15 more mAh while the weakest cell already gets reverse charged and the total voltage is still well above a level where most devices designed for alkaline 9V's would shut down. This unfortunately means that this first cell will lose capacity rather quickly, leading to a rather quick failure of the whole battery.
 

TinderBox (UK)

Flashlight Enthusiast
Joined
Jan 14, 2006
Messages
3,488
Location
England, United Kingdom
Discharge results are very close to rated capacity which is nice to see.

Small point the photo`s of the battery sides the text is upside down, just needs rotating.

Great review as always.

John/
 
Top