Li ho acquistati per poter usarli nella mia torcia MAG LITE con led e due batterie D.Questo perché ho un gran numero di batterie ricaricabili Ni-Mh formato AA sia della eneloop, a mio parere le migliori, che di altre marche.Grazie a questi ottimi adattatori la torcia risulta molto più leggera di prima, anche se per contro l’autonomia in ore di luce diminuisce rispetto a batterie D. Ma per il mio uso in ogni caso durano fin troppo a lungo

Adaptadores extremamente simples práticos e versáteis. Uso junto com lanternas maglite incandescentes. Posso agora usar baterias AA nessas lanternas, inclusive baterias recarregáveis.

Estaba harto de estar comprando pilas D para mi Boiler nuevas, con esta opcion uso recargables AA que me sobran y mi vida es mas facil.

Product is Made in China, but appears original one of Panasonic. Accommodates AA size chargeable batteries perfectly well inside the slot. Size/ dimentions of adapter is exactly/ precisely the same as that of a D size dry battery cell. The adapters are sturdy and durable. No problem found. Thanks Amazon. The price is, however, high.

Muy practicas me evita tener que compra pilas C y el cargador. Funciona a la perfección introduciendo la pila AA

Me gusto la idea de tener unos convertidores de AA a DD, los uso en una lampara coleman LED y funcionaron perfecto, solo hay que tener en consideración que el rendimiento no es igual a una DD pues la capacidad AA es menor, sin embargo es una opción perfecta si no tienes inconveniente de cargar tus AA cada vez que se agoten, en mi caso son muy útiles pues la lampara la uso solo para casos de emergencia y no solo para usarlas un par de veces.

I bought these to put into a Fisher-Price toy using rechargeable AA batteries and did the job nicely. The batteries "click" into place which is good.

Fácil de usar y quedaron muy bien en un boiler de paso Bosh. Compre la pila eneloop pro. Y funciona excelente, tres semanas con la misma carga y sigue encendiendo. El material es de buena calidad y cierra fácilmente.

UPDATE 07.01.2022. Having 3 or 4 of these adapters in a row in a MagLite I observe some dent in the negative pole (back on the metal) where the other positive pole is resting against. It could be as well just me as one time the heavy 4 D cell MagLites spring wasnt sitting all in and it must have given more pressure on these adapters than normal bending the metal a bit. But then again the front part of the MagLite is springloaded as well, so... But these are built sturdy and so damage is unlikely. Yes these measure 61 mm from the +pole to the end of the -pole plastic cap that is the same overall dimensions from outside as an D cell battery has according to its specs. These are made of ABS plastic and that can be attacked slightly by Vaseline. So I recommend NOT to apply Vaseline (or petroleum jelly) to the metal parts of the adapters in order to prevent rust. I normally tend to grease slightly metal contacts with Vaseline as that is recommended by MagLite for their flashlights. ABS plastic can be weakened and swell slightly on from spilled over Vaseline so do not do that.UPDATE 22.12.2021. The D cell adapters of this latest gen I got of these Eneloop adapters measure exactly the same as an D cell battery would. That is 61.5 mm. I measured it with an caliper. The complaints other reviewers have about bad fitting when stacked most likely is a problem with older generations of these adapters. The latest gen at least has fixed that problem since the adapter itsels is now of an very different design, much improved design, and measures exactly the same dimensions from end to end as an D battery would. The latest generation have an vastly improved design over previous generations of these adapters. At least the D cell versions. It may be the C cell adapters sport still this design flaw since the C adapter design is still the same as the flawed D cell design of previous generations used to be.The D cell adapters have no engineering flaw nor design flaw anymore and are the best adapters in the market today.Main review:Excellent. Best idea ever. Awesome.This new design of the Adapter works well in an 3 D cell Maglite. The huge negative contact face is just awesome. Works well and makes the light lighter. I have these in use already for a few years.Seldom I give such an 100% positive Review. I can not find any negative or flaw on these D cell Eneloop adapters.Awesome. 5 stars.This newest design is perfect since it changes the tiny negative contact to an huge area one which is big enough for the huge spring of the MagLites. Eneloop had a previous design which was flawed but since has upgraded the design. This is prefect and solidly built. I use it in all my D cell appliances like radios and flashlights. It saves you different sizes of rechargeable NiMH batteries so you can stick just to size AA mostly and for some appliaces AAA (control remotes, etc.)Dont go for other brands. You cant go wrong with this Panasonic Eneloop brand. Perfect engineering. These are built sturdy as they are reinforced with plastic ribs from the inside. That gives for a big stability. I grease the metal contact parts (positive and negative) with Vaseline which is actually recommended by MagLite.Using these with AA Eneloop NiMH gives you about 16 hours of run time instead of the 80 hours claimed when using alkaline D cell batteries with an 3 D cell LED MagLite with an 168 Lumen LED bulb.Dont hesitate. Buy these.

Buena opcion de compra. Excelente material y gran desempeño. Ademas del ahorro a futuro en baterias.

muy buen producto me gusto la adaptabilidad, con ello evitas comprar las grandes pilas y, con un recargador, que puedo decir; la duracion es poco menos de la mitad en comparacion con las pilas normales, pero es cuestion de checar cada semana, un poquito elevado el precio, pero lo vale (tarde mi reseña porque las use en un boiler de paso, que apenas termine de probar), racias.

Excelente producto. Después de 1 mes de uso funcionando al 100%. Utilizo baterías AA y con el adaptador puedo utilizar artículos como lámparas, teclados. Permite un ahorro económico importante al no tener que adquirir directamente baterías D. Definitivamente recomendable.

Adaptables a tamaño C con una pila doble AA y sobre todo es mas práctico porque las pilas doble A son mas facil de encontrar en cualquier tienda y mas economicas que el paquete de C. Tambien si uno ya cuenta con recargables doble A, pues se contamina menos. Compraré posteriormente las de tamaño D. Plastico de calidad y cumplen su funcion perfectamente.