SunLabz D Rechargeable Batteries, Ultra-Efficient NiCD, 8 Pack

I got these a long time ago, after a short time the flashlight was very dim, so I recharged the batteries, and it was still dim. So I thought it must be the bulb. Put in a new bulb and it didn't make any difference. Used another couple of batteries and thought it was the flashlight. So I threw it out and got a new one from Amazon. When the new one came it still didn't work very well. I came back and read the reviews of this product and found out I threw out a perfectly good flashlight. I had a some non rechargeable batteries and that was the charm. These batteries don't take a charge. Disappointed.

I had some old D cell batteries for one of those air pumps for air mattresses and I would get one fill up out of them. They were a name brand battery. I got these and used a modern battery charger for these new 5000amh kind of batteries. I got several fill-ups of a single air mattress (4 D cells) and the air pump doesn't seem to be loosing power. This is just what I needed. I wanted to charge these up and be able to go camping for a few days and use the pump without having to bring a charger for each fill up. These hold a lot of power. They are heavier than the old rechargeables I had. Probably close to the weight of alkalines. I bought 8 so I could have 2 pumps running. I am very happy with these.

Later about 2. Charges and that was it. They do not hold a charge. You would literally have to charge these right before you needed then, they will not hold a charge when not in use and drain extremely fast when I'm used. Completely worthless.

Update: It is almost July And two more have died l, leaving me with 3. One less than I need to run the dog door that I bought them for.I bought these in January and two were dead by April and now one more is dead and it's only June. I initially thought it was the charger but replaced it and they are still dead. I have a dog door that requires four batteries, so I thought it would be nice to buy 8 and have 2 sets and not have to spend loads of money on regular batteries, but now I still have to buy regular batteries to keep around while the remaining 5 good ones charge.

I purchased these to operate my cats automatic feeder. I had Duracell D batteries in it for over a year and they finally went dead. I knew moving to rechargeable would mean I would have to replace them far more often than the Duracells, but they died after about 10 days. I recharged them, and they didn't work at all. Tried them in a few other D-battery electronics and that didn't work. Put them in the charger some more, still didn't do anything. Had to buy new D-batteries from the store. Now I have 8 useless rechargeable batteries and a charger. Waste of money.

I bought 8 D-cell Batteries from SunLabz. Most of them are working fine, but 1 now is consistently coming up with an error in charging. I contacted them twice about it and have not heard anything back yet. Once I see how the Customer service is I will update my review. Update - A second D cell now is in error. Only 2 months in and the company does not get back to you. Do not buy.

Put 4 batteries in a charger. Waited for battery to fully charge and removed them from the charger. Placed batteries on my a wood pressed desk top for 4 hours. Put same 4 batteries in charger. Battery charger state showed charging.UPDATE: Fully charged and let sit on my desk for 24 hours. Batteries DID NOT hold charge.

Ended up being crap. With regular batteries, I would have to change my luminara candle batteries about every 3-4 months. With these, it's every 3-4 days. Then the charger says they're all full but half of them are still dead. Would never buy again.