Gomadic Advanced Garmin iQue 3600 AA Battery Pack Charge Kit - Portable power built with upgradeabl

• Specification: Input Voltage (4 X AA Batteries), Cable length (6 inches), Dimensions (5.0 X 1.5 X 0.75 inches), Circuit Design (Garmin iQue 3600 specific), TipExchange enabled (Yes)
• Integrated circuitry regulates output voltage specific to the Garmin iQue 3600. Advanced logic maximizes overall charger efficiency.
• Built using the unique Gomadic TipExchange Technology that protects your investment by providing the ability to upgrade charging ports by simply swapping physical connectors.
• A must have accessory for the frequent traveler, camper or heavy Garmin iQue 3600 user.
• Safely engineered with reverse polarity protection, in the event batteries are accidentally put in incorrectly.

The extender does the job but it's poorly designed. It's too small to properly accommodate rechargeable batteries; you have to squeeze them in and press the lid so they don't burst out. The lid locking mechanism seems to be very delicate and all that pushing could easily break it. The connector requires some pushing/tugging to attach/remove it from the PDA.

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Somewhat skeptical about this until I used it. Works great for those unexpected times when the internal battery runs down. I would not recommend it for times when you need the GPS though it drains those AA batts really quick.