We have AA and AAA solar rechargeable 1.2V Ni-CD, Ni-MH and 3.2V batteries for solar lights available in various mAh energy storage 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. They have a plug-in wire attached to the battery pack that plus into the solar light circuitry. Please read each product to determine if it is the correct Gama Sonic rechargeable battery for your solar lantern.
The Atlantic Solar 3.2V Lithium Ion solar post cap light battery must always be replaced with a 3.2V Lithium Ion battery. You can increase or decrease the mAh storage capacity, but you cannot change the 3.2V to a 1.2V. 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 asked by customers constantly "can I use regular batteries in solar lights?". The answer is Yes and No.
Yes, you can install an Alkaline battery into a solar light for the sole purpose of checking to see if the solar light needs a new battery. Once you have determined that the light works with the new battery, remove the Alkaline battery and purchase Ni-CD or Ni-MH solar rechargeable batteries to install in the solar light.
No, 1.2V Alkaline batteries are not meant to be installed in anything with a solar panel that draws energy from the sun and stores it in a "solar battery". They have a built-in charge that will only 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 the whole point of solar powered to save electric energy is pretty much defeated. Also, and most important, using alkaline batteries may harm your solar light circuitry over time, and the light will stop working.
Ni-CD, Ni-MH and 3.2V Lithium Ion solar batteries are designed to charge and discharge daily using solar power, not electricity. 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.
The voltage must be exact when you replace your batteries for solar lights. If the existing battery is a 1.2V, you must replace it with a 1.2V battery. If the existing battery is a 3.2V, you must replace it with a 3.2V battery. Voltage is not interchangeable.