The new-generation VARTA NiMH rechargeable button cell has an environment-friendly Nickel Metal Hydride technology for many applications, and a slim designed battery provides a long life cycle. Batteries have a GCE electrode, providing a capable overcharge and low self-discharge with flat discharge voltage. You can use the battery in any position; the batteries cover a +65C temperature range. Batteries are supplied fully charged plus have excellent recovery if stored for long periods, but you should always re-charge before using. Can be used as memory batteries (backup), or in communications equipment, computers and consumer electronics. Without a soldering tag.