Crestron electronic Internal Battery Pack TPMC-4XG-BTP - Manual (Page 7)

Crestron TPMC-4XG-BTP Battery for TPMC-4XG & TPMC-4XG-B
NOTE: The battery pack may take up to three hours to charge in a
powered touchpanel if the panel is in use during charging.
Storage
The TPMC-4XG-BTP can be stored in a temperate, dry place (removed
from the touchpanel and docking station) indefinitely without significant
irreversible degradation of its performance. The self-discharge rate is a
function of temperature and internal resistance. High temperature storage
reduces charge retention. Best results occur if the TPMC-4XG-BTP is
stored at an optimal temperature of 32° to 104°F (0° to 40°C). After an
extended period of storage, initiate a few charge/discharge cycles to
restore full capacity.
NOTE: The TPMC-4XG BTP should be 30-50% charged when put into
storage.
Disposal
NOTE: The TPMC-4XG-BTP contains a Lithium Ion (Li-Ion) battery.
When the unit can no longer retain a charge, it must be recycled or
disposed of properly. Follow local ordinances and/or regulations for
disposal.
Installation Guide – DOC. 6657B Internal Battery Pack: TPMC-4XG-BTP • 5