We have replacement rechargeable batteries for solar lights available in various mah capacities, including the 3.2 Volt Gama Sonic lamp posts and Atlantic Solar post caps.
The Gama Sonic replacement battery packs are made for specific Gama Sonic products. Please read each product to determine if it is the correct Gama Sonic rechargeable battery for your solar lantern.
We believe it's wise to replace a 1.2 Volt Ni-CD with a Ni-CD, or a Ni-MH with a Ni-MH rechargeable battery to match the circuitry used in the original solar powered light. Ni-MH will definitely work in Ni-CD lighting, but it seems to cut down on the battery life from our experience, often only lasting a few months.
A 3.2 Volt Lithium Ion solar light battery must always be replaced with a 3.2V Lithium Ion battery. The circuitry for a 1.2V vs. a 3.2V is completely different, and is not interchangeable.
The mAh number, which is the maximum amount of charge the battery can hold during one full sunny day, can be increased on any type of Battery (not including the Gama Sonic solar lamp post lights) without causing any damage.
We are questioned by customers constantly if they can use a regular rechargeable 1.2V AA or AAA Alkaline battery in solar lights. The answer is Yes and No. Alkaline batteries have a built-in charge that will last until it is depleted, whether that's for a week or for months. There is no way to recharge it unless you remove it from the light, bring it indoors and charge it with an electric battery charger. So you can use these for a short time period until you can purchase the correct solar light batteries.
Ni-CD, Ni-MH and Lithium Ion batteries are designed to charge and discharge daily. Every day the battery is charged from the sun's energy that the solar panel captures, and every night the battery's energy is discharged by lighting the solar lanterns or garden lights. Rather than a predetermined amount of charge like an Alkaline battery has, these batteries have a maximum number of times it can charge and discharge, which generally is between 2 and 3 years.