DSLRKIT 3AA(LR6) to D Size Parallel Battery Convertor Adapter Holder (pack of 12)

Excellent

Good quality. The plastic is solid and the connections adequate. The big question is whether you have a NiMH D cell charger. Once inserted the 3 AA cells are a bit difficult to remove - not impossible however. A D-cell NiMH charger is much more convenient. Putting 3x IKEA LADDA (Eneloop) 2250mAh AA NiMH cells in one of these produces a 6.7Ah D-cell at much lower cost that a typical NiMH 8Ah rechargeable D cell. I have used 3 of these (9x AA LADDAs) in a 3 cell Maglight LED conversion and it runs for over 10 hours.

The "DESLRKIT 3AA(LR6) to D Size Parallel Battery Convertor Adapter" is an excellent choice to substitute non-leaking AA LITHIUM batteries in D-Cell devices, like flashlights. Since D-Cell lithium batteries are not available, these AA adapters are an excellent alternative to [eventually] leaking D cell batteries and destruction of the device. For example, after a leaking Energizer D cell ALKALINE battery destroyed my expensive MagLite flashlight, Energizer would not honor their device replacement warranty since the battery was [slightly] beyond the warranty date, a loophole that destroyed my confidence in Energizer, and all battery manufacturers, where a 50 cent battery ruined a $50 flashlight! Although, old style cheap low performance "HEAVY DUTY" (an oxymoron) "zinc-carbon" batteries, that are still available today, often leak within months and have ruined countless devices. Whereas, newer style ALKALINE batteries with device warranties typically expire within 5 to 10 years, however, they still leak and ruin devices. To minimize your risk, check the expiration date on each battery periodically. If expired, remove and dispose, regardless if clean and still holding a good charge, to avoid possible leakage destroying your device without warranty recourse. Of course, this creates unnecessary waste and is a scam to decrease the manufacturer's liability and increase battery sales. The latest style Energizer AA (and AAA) LITHIUM batteries and devices are warranted for 25 years, far longer than than traditional D (and C) cells, where, the smaller lithium batteries are not known to leak per se. Although being relatively new technology, it will take decades to prove-out. Nevertheless, a 25 year warranty is terrific and offsets the higher cost when storing devices for long periods without periodically replacing and trashing otherwise good batteries. Another advantage using lithium batteries is the lighter weight compared to alkaline batteries. The downside is a lower milli-amperage rating of the 3-AA cell cartridges compared to alkaline D cells, where so far, have not noticed a difference in the MagLite lumens. Have replaced all my D cell battery devices with these adapters, placing 3 AA's in each and up to 6 adapters in-series for the longer 6 D cell flashlights. Since the diameter of the adapter is slightly smaller than the D cell, they rattle inside flashlights. To reduce the rattle, a piece of printer paper was cut down to size and wrapped around the series of adapters, overlapping about 1-1/2 turns, but leaving enough space between the cells and the tube wall to allow the adapters to easily slide in and out of the flashlight. It is expected never to buy D cells again for flashlights while using these AA adapters, and saving money buying lithium AA's in bulk packages.

I've been using these for years, this converts 3 x AA 1.5 volt to 1 D cell 1.5 volt , so you can insert your favourite AA batteries, it does what it's designed too very well.

These D size parallel adapters work well - I use them in my D maglites and have had no issues. Some reviewers have commented that the AA cells are very hard to pull out of the adaptors. I've had no such experience - perhaps the manufacturer has updated the adapters to make them more user friendly.