Eneloop Panasonic BQ-BS2E4SA C Size Battery Adapters for Use with Ni-MH Rechargeable AA Battery Cells, 4 Pack

I bought these D Size Battery Spacers for use with my Eneloop AA batteries and these work great. I had previously bought a couple of lanterns and the one takes D batteries. I didn't mind that it took D batteries but the weight of 3 D batteries is more than 3 AA batteries and adds weight to an item that if you use it for camping you want to reduce the weight because you are carrying that item. Plus the D batteries I had originally installed were just throw away alkaline batteries. I always want to reduce waste so since I already had some AA Eneloop batteries, that I like a lot, I wanted to use them in my lantern and these spacers helped me do that. The lantern worked great with these batteries with no difference in function. They are so simple it amazes me that I had not used these before. The bottom unscrews and pops off and you just insert the AA Eneloop battery into the spacer correctly and seal it back up. They are now D cell sized but not D cell heavy plus when they run down I just have to recharge them. Now you can not recharge them within the D Cell spacers but they just unscrew and you take the AA battery out. I have not come across anything yet that will not run on the Eneloop AA battery inside or outside the D cell spacer but I rarely come across anything that uses D sized batteries. My Eneloop batteries are the Panasonic branded versions not the Sanyo so I can not comment on previous versions of Eneloop and the D sized spacers. So I would recommend these spacers for anyone who wants to reduce the weight of D cell battery operated devices as well as one who wants to reduce waste/cost of D cell batteries for those devices and also one who wants a rechargeable option that will last for years.

Works perfect for UNO Flip Attack Card Game with Launcher Unit which was needing D cells!

Fantastic product, very easy to use. Great value!

I have a large number of Eneloop Pro AA and AAA batteries, but received a lighted decoration at Christmas as a gift that required D batteries. Rather than buying disposable batteries, I got these adapters and they worked to perfection!

Great idea and works well but I had to put AA in 'reverse' for my candles. They fit snuggly both ways, so not harm, no foul - they went from 'p.o.s!' to 'these work great' which is why 4 stars.

So many of the smaller battery powered devices I have seem to not be 'designed' to support the 1.2v level batteries anymore, but insist on something closer to 1.5v or they throw a low battery warning very soon after a battery swap. As a result, I had quit using my AA rechargeable NiMH batteries and was switching to the Lithium rechargeables with 1.5v output as I could afford them. But I saw these adapters and they looked like they had high enough quality they would last for a while. So decided to use these with all my 1.2v AA rechargeables as most of MY use of D cells was flashlights and they don't generally nag at you about battery level as the bulb not illuminating well is the universal sign it is time to swap out the D cells. I always put off buying any D Cells (alkaline) as I use them so infrequently and they cost so much per battery. And I didn't want to buy a desktop charger for D cells as I would hardly ever use it. When I saw the (looks like) higher quality AA to D adapters I decided it was a way to 'recycle' my old tech 1.2v AA rechargeables I had been thinking of throwing out. Yes, they won't last as LONG as D Cells (Alkaline or NiXX) - but if you are like me, you leave the flashlight switched on way too often and run the cells down before the next use anyway. So not an optimal solution to spend too much money on 'creating' - but if you have a medium to large size pile of older rechargeable AA batteries this may be a low cost way to put them back into the 'things I actually like to use group' of stuff you own. A way to 'recycle' the old 1.2v tech to get a few more years out of it. I had 32 of the old NiMH AA's and with the 8 pack of D Cell adapters I have 'plenty' of (wimpy but usable) D cells ready to go (for a day of use maybe) whenever I need them.

When I opened the package I had to ask myself, 'what did I buy?', but actually these gizmos are ingenious. They are nothing but an empty plastic case that holds a AA-sized battery, allowing you to run devices that take D-cells using AA batteries. While I wouldn't recommend these for high-drain devices like older desktop radios, for things like LED lanterns, flashlights, and other fairly low-drain electronics, these make sense. I use these, along with Eneloop AA cells, to run camping lanterns and a few emergency radios. When the AA cells in these cases run down, you can just drop in a freshly charged Ni-MH AA cell (Eneloop or similar), or in a pinch, use an alkaline AA cell.

I've got an old Maglite flashlight that I've owned since the 1970's. It uses 4 alkaline D cells. Over the years I've had to clean it out numerous times due to the batteries leaking. I was even debating just throwing it away. I looked at quite a few adapters, but most seemed to be really cheaply made. Enter the Eneloop Panasonic AA-D adapter. I replaced the incandescent bulb with an led and the alkaline batteries with the adapter and 4 lithium AA's. WOW, what a difference. First, this battery adapter is much better made than the competition. Second, the flashlight's a lot lighter. Third, there's no worrying about battery leakage. And finally with the led bulb, it's super bright. New life for an old flashlight.