Tenergy's 4 Pack Centura rechargeable D batteries generates long term energy savings when switching from alkaline household D batteries to rechargeable batteries. Tenergy's low self-discharge D size battery experience significantly low power loss when properly stored and unused. Centura low self-discharge D battery can retain up to 85% of capacity even if stored for 1 year! Rechargeable up to 2,100 times without significant capacity lost. Tenergy's Centura rechargeable D batteries will work like new even after a year of daily usage. One of the most cost-effective batteries, the Tenergy rechargeable NiMH D battery pays for themselves after 10 cycles. Avoid wasting time and money on the disposable alkaline batteries and replace them with our rechargeable Centura 1.2V Rechargeable D Battery to decrease the waste disposables leave behind. Use these rechargeable D cell battery right out of the box when first received, or fully recharge them for the best experience. Batte