Battery-Biz Hi-Capacity B-5028H Laptop Battery for Lenovo: * Warranty: 12 months * Chemistry: Li-Ion * Original Amp: 7.8 * Volts: 10.8 * AmpHours: 6.6 * Color: Black * Description: Rectangular shaped laptop battery with slit type contacts on one side * Capacity Format: Extended * Number of Cells: nine * Vendor Warranty: 12 months * Works with Lenovo ThinkPad Z60m T60 T61 R60, Battery Models 40Y6797 What Are The Different Types of Rechargeable Battery Chemistries/Technologies? Li-Ion has quickly become the standard for portable power in consumer devices. Li-Ion batteries produce the same energy as NiMH batteries but weigh approximately 35% less. Li-Ion batteries do not suffer from the memory effect AT ALL. They are also better for the environment. What does the mAh mean and how does it relate to how long my battery will last? mAh stands for "Milliamp Hour" and it is the unit used to measure battery capacity. The higher the mAh rating of a battery, the longer it will operate at the device"s power consumption rate before needing to be recharged. Should I Recycle My Old Battery? How? NiCad, NiMH and Li-Ion batteries should be recycled. Be environmentally conscious - do NOT throw these batteries in the trash. If you don"t know where your local recycling facility is, call the Portable Rechargeable Battery Association at 1-800-822-8837. They will provide you with the address of the recycling center nearest to you.