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Battery Care
To ensure the long life and safe handling of the Li-Ion battery
within the BTR-24 and TR-24 please following the following
precautions:
1. Store the TR-24s and BTR-24 in a clean, cool, dry location
away from heat.
2. Do not store for extended periods of time in direct sunlight.
3. Do not disassemble the battery packs within the TR-24 or
BTR-24.
4. Do not apply solder directly to the pack.
5. Do not puncture/crush or subject the TR-24 or BTR-24 to
excessive impact.
6. Dispose of unit in proper recycling location for a device with
a Li-Ion battery.
Long Term Storage
“Long term storage” of the system is defined as no use of the
system for 1 month or longer. Due to the internal Li-Ion batteries
of the TR-24 and BTR-24, care should be taken in long term
storage. Use the following steps to ensure the best performance
of the system after it comes out of storage.
1. After the last event:
• If the TR-24 or BTR-24 batteries were used for four hours
or less then do not recharge the internal TR-24 or BTR-24
batteries. (Please see the discussion of “Li-Ion batteries”
in the follow part of this section as to why)
• If the TR-24 or BTR-24 batteries were used for more then
four hours then recharge the internal TR-24 or BTR-24
batteries for two hours then take them off charge (Please
see the discussion of Li-Ion batteries in the follow part of
this section as to why)
2. Store the TR-24s and BTR-24 in a clean, cool, dry location
away from heat. The temperature of the storage location
should not rise above room temperature. The recommended
temperature range of the storage location is 32 - 77° F (0 –
25° C).
3. Every 6 months charge the BTR-24 and TR-24 for three
hours then take off charge. Do not fully charge. This
prevents the battery from over discharging and helps
maintain the battery’s performance.
Li-Ion Batteries
The Li-Ion batteries used in the TR-24 and BTR-24 are excellent
batteries for portable, indoor/outdoor applications. They have a
high energy density (energy per weight) compare to other
rechargeable battery technologies (NiCd, NiMH, Alkaline, Gel
Cells), are low maintenance, and offer superior performance at
low temperatures.
For best performance after long-term storage, Telex recommends
the batteries be charged to 30% - 50% of capacity before being
placed in storage. This is the typical battery capacity left after 4 –
6 hours of full duplex use. Li-Ion batteries retain nearly all their
capacity if stored for long term in dry, cool temperatures with
only 30% to 50% charge. They can lose up to 20% capacity if
stored for long term right after being fully charged.
Section 7 - Battery Care/Long Term Storage
7-1