Worked real nice.

This seems well built and easy to use. The batteries slide in from the sides and swap out easily. Having three AA in a D cell holder should give plenty capacity.

I only use rechargeable Ni-MH batteries and the D size ones have begun to fail. Considering the replacement cost of these, ~$7.50, It seemed better to buy this adapter at $5 each and use my Sanyo AA batteries. I used about 15 of these adaptors during the recent holidays without any problems. They are well made and with reasonable care should last for years. I don't think I would have tried them at the Regular price of $20 or even at the current sale price of $10. Wait for the $5 dollar sale before getting them.

We have several of the UST LED 30 day lanterns. I wanted to keep one stored with batteries at all times, but with the propensity of Alkaline batteries to leak all over everything these days, I couldn't do that without risking destroying the lantern. Then I found these Titanium Innovations Parallel AA adapters. They're perfect! I use the Lithium Ion AA batteries in them and now I store a lantern ready to go any time I need one.

These are well made adapters - very sturdy, and they hold the AA cells securely without exceeding an appropriate diameter. Unfortunately, unlike the single-AA Eneloop D adapters, they are several millimeters taller than an alkaline D cell, which makes for a tight fit in many cases.

In the case of the Coleman CPX 6 lantern, these do not fit at all.