These Energizer solar rechargeable batteries come pre-charged from the factory. Therefore, you can insert them into your solar lights and they will start illuminating the same night.
Batteries must be charged to store up electricity in form of electric charges which can later be used. Not all rechargeable batteries can be suitable for solar lights but some has been found to do well such as these. Nickel-Cadmium (NiCd) batteries are used for solar lights but NiMH batteries are also very useful.
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Frequently Asked Questions
Are solar rechargeable batteries the same as rechargeable batteries?
Solar lights run on rechargeable batteries and they come with the solar lights when you buy it. No special batteries required for solar lights. All they need is either NiMH (Nickel Metal Hydride) or NiCd type rechargeable battery.