New batteries should be placed in the charger CH3505, CH3507 or CH3508 for minimum 12 hours first time. During daily use, always keep the battery fully charged and away from hot areas. Keep the battery terminals dry and clean.

Never discharge beyond the specifications of the battery. Operation/Standby time depends on usage. Generally, the more the radio is transmitting, the faster it will drain the battery.

Also, the “Hi” power setting will drain the battery faster than the “Lo” setting. Approximate figures are:

• A battery can be stored for 4 to 6 month at 25°C if charged to 40%.
• The battery will normally last for 5 to 9 hours of use on a fully charged battery.

SAILOR Thrane & Thrane B3906 Lithium Battery Specifications:

• Nominal capacity – 1650 mAh
• Voltage – 7.4 VDC Li battery
• Battery Type – Lithium-Ion, rechargeable
• Model Name – B3906
• Part Number: S-403906A
• Radio Model: SAILOR SP3965 ATEX UHF Fire Fight Radio