Energizer Recharge Universal Rechargeable D Batteries save money and reduce your impact on the environment. Made with 7% recycled batteries, these D rechargeable batteries use innovative, industry-leading technology to provide lasting chargeable batteries. The rechargeable D battery is designed to prevent leaks that can damage your electronics. Use these Energizer rechargeable batteries as long-lasting flashlight batteries and in other battery-powered items. These Energizer D batteries can be charged in an Energizer battery charger hundreds of times. The D size batteries hold the charge for up to 1 month in storage, and the D cell batteries have up to a 3 year battery life with normal use. Energizer is the world's number 1 recharge brand.
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In response to the short lifespan between charges I offer this. If you look at the mAh rating of these, they are only 2500 which is similar to that of a good AA rechargable battery. These, as are most others, are merely a AA battery in a D shell. What you need is a D cell that is at least a 10,000MAh rating. That will equate to a regular D cell battery that you would expect. You can Google 10,000mAh D cell on the internet and find multiple places that have them.