WHY THEY LEAK OR EXPLODE?

1. Never drain an alkaline rechargeable! If the calculator gives you a warning that the batteries are low then you have gone too far. When drained, the alkaline will leak and when charged in this condition, can give off a gas that makes it "blow up". That is the main thing people do wrong with these newer type of battery.
2. The second cause could be the charger. Ni-Cad chargers charge constantly and never shut off. Alkaline charges contain a charging circuit to shut the charging down when they are full. If you put an alkaline battery into a Ni-Cad charger, it never shuts off. It will fry the batteries. Use only alkaline chargers for alkaline batteries.

WHEN TO CHARGE

When you bought your Schoolcells you were given a "Charging Schedule" that goes on the calculator door. Follow this the best you can for best value and to keep your warranty in effect. If you do not have a Schedule, you may purchase them for 20 cents each.

HISTORY OF THE ALKALINE RECHARGEABLE AND THE CANADIAN CONNECTION

Battery Technologies, in Toronto has the patent for the Alkaline Rechargeable technology. It licensed it to Pure Energy Visions in Canada and Rayovac in the USA. Rayovac has not upgraded the original formula for the rechargeables and has ceased making them. Pure Energy Visions, who makes the Schoolcell for CCS, uses only latest formulation. In 2005, the Schoolcell XL was introduced just in time for the higher drain TI-84+ with the USB port. CCS is the exclusive North American distributor of Schoolcell.