What are the best batteries? What are the best rechargeable batteries?
According to the battery reviews we need first to determine which type of device the batteries are going to be used for.
Does it drain power quickly or slowly?
The answer will help us select the most effective battery for that device.
Choosing the wrong battery will cost us more money and may even damage our equipment.
It is therefore very important to identify whether our device is high-energy or low-energy.
Digital cameras, MP3 players and power tools are high-energy devices, flashlights and electric toothbrushes medium and CD players, clocks and remote controls are low-energy devices.
Lithium, titanium and special alkaline batteries are designed for high-energy devices, whereas regular alkaline batteries work best with low-energy devices
Battery technology has indeed progressed a lot during the last few years and has become a priority with the introduction of hybrid and electric cars.
New batteries are coming on the market with amazing specifications.
The Best Rechargeable Batteries
The best rechargeable battery for high-power devices is the Sony Olivine-Type Lithium Iron Phosphate battery.
Why is the Sony Olivine-Type Lithium Iron Phosphate battery the best rechargeable battery?
The Sony Olivine-Type Lithium Iron Phosphate battery has a nominal voltage of 3,2 V and a power density of 1800 W/kg at 20A, which is about 7 times more than a NiMH battery. A NiCd battery has only 150 W/kg and a Li battery has about 340 W/kg.
Most rechargeable batteries can be recharged between 500 to 1,000 times before requiring replacement. The Sony Olivine-Type Lithium Iron Phosphate battery can be recharged 2,000 times and still retains more than 89% of its capacity. That’s more than twice the amount.
A rechargeable battery takes between 1 to 6 hrs to be recharged. The Sony Olivine-Type Lithium Iron Phosphate battery can be charged to 99% of its full capacity in 30 minutes.
The Second Best Rechargeable Battery
Most batteries reviewers picked the Sanyo Eneloop as the best rechargeable battery for low-power devices.
Sanyo Eneloop batteries are hybrid Nickel-Metal batteries and contrary to regular NiMH rechargeable batteries, which lose 23% of their capacity in 1 month, they self-discharge very slowly and after a year still retain 85% of their capacity.
They have a power rating of 2,000mAh compared to 2,700 mAh for some of the NiMH batteries but because they self-discharge so slowly they actually last longer in devices which are used only once in a while.
The Sanyo Eneloop batteries are not expensive and are very cost effective. They are very convenient because once they are recharged they are ready to go after several months. They however drain easily in high energy devices.