Top positive review
57 people found this helpful
Long lasting rechargeables
on March 19, 2011
These batteries are far superior to the D size rechargeables from name brand manufacturers. They are a bit more expensive, but they hold substantially more charge, and they retain their charge over many months.
I purchased them for my large Mag-Lites which are kept around the house (in case of power failure) and in the garage (for daily use). I bought some other D rechargeables but found they would only hold their charge for a few weeks, making the emergency flashlights useless without continuous tending. That isn't a problem with these batteries. I have a set that has now held a single charge for over four months despite frequent use.
In addition to longevity, they sport substantially increased capacity over other D rechargeables (8000mAh vs 2600mAh per manufacturer spec). The length of time I can use my flashlight has increased from 30-40 minutes to several hours, comparable to the alkaline D cell batteries I used to purchase.
I haven't had time to do formal capacity or retention testing, but from four months of reasonably heavy use, I can say I would definitely buy them again.
One drawback - you need a "smart" recharger. Regular rechargers shut off after a set time, which will only put about 1/4 of the capacity into these batteries. A smart recharger will charge until the battery is at capacity.