If you are looking for a product that has already been tested for aging, look no further. You won't be disappointed.
1. T-Mobile's "LifeProof" Rechargeable Battery Cell Rechargeable Batteries (Bead-Back or Nano Batteries ) The LifeProof batteries have been around for over a decade. Their high-end Bead-Back batteries have been used in the likes of Samsung and Apple. They offer a charge in under a half an hour with no need to charge at all. These Bead-Back batteries are also great at making phone calls, and charging while doing it. 2. T-Mobile's LifeProof Multi-purpose Batteries (MPDs) These are a lot like the Bead-Back batteries, but have more in common with the Samsung Galaxy S series, including the battery cell type, but with a better rechargeable capacity and a longer charge time. 3. BIC's "Biotech" Battery Cell - A very common cell in cell phones, this is not a true battery cell, it is a "BIC" (cell of interest) made from a synthetic polymer and a metal core to improve its charge efficiency, it is usually called a biodegradable battery. 4. Motorola's "LifeProof" Battery Cell - These are a type of BIC cell, also known as "Biodegradable Batteries." These are very popular in cell phones and are also used in rechargeable batteries. They are known to have a much higher rate of degradation than "normal" BIC cell.