FDK CR8-LHC CR17450 Replacement Battery 3V 2400mAh

FDK CR8-LHC — 3V Li-MnO2 Replacement Battery (CR17450SE)

The FDK CR8-LHC is a 3V lithium manganese dioxide cell in the CR17450 (A-size) format, rated at 2400mAh (7.2Wh). It fits industrial instruments, medical devices, memory backup systems, and security equipment that specify the 17mm × 45mm cell format. This is a non-rechargeable primary cell — once depleted, replace it.

• CR17450 format compatibility: Any device specifying CR17450 or CR17450SE uses this exact cell size and voltage rail. The 17mm diameter and 45mm length are fixed — there is no interchangeable rechargeable equivalent at this form factor without a housing adapter.
• Bench tested on actual hardware: We measured open-circuit voltage on arrival at 3.0V–3.1V, which is normal for a fresh Li-MnO2 cell. The BMS or acceptance circuit in medical and industrial instruments typically rejects cells reading below 2.8V, so we flag any cell outside that window before shipping.
• Storage condition check before install: Check the manufacture date printed on the cell wrapper before dropping it into long-term backup equipment. CR17450 cells stored above 30°C or in humid conditions can self-discharge enough to read below a device's acceptance threshold — even within the stated 10-year shelf life.

CR17450 reading lower than 3V before first use

A fresh CR17450 cell ships at its storage voltage, typically between 3.0V and 3.1V under no load. If a cell reads below 2.8V on a multimeter before installation, it has self-discharged — usually from extended storage in warm or humid conditions. Li-MnO2 chemistry self-discharges at roughly 1% per year under ideal conditions, but heat accelerates that significantly. Reject any cell reading below 2.8V and source a replacement with a more recent manufacture date.

Device not recognising CR17450 after long shelf storage

Industrial instruments and medical devices often run a voltage acceptance check on startup — if the cell reads below the device's threshold (commonly 2.85V–2.95V), the device flags a battery fault or simply fails to boot. This is not a device fault; it is the cell failing the acceptance check due to self-discharge. Clean the cell contacts with isopropyl alcohol, seat the cell firmly, and measure terminal voltage under load using a multimeter set to DC voltage — a healthy cell should hold above 2.8V with a small load applied. If voltage drops immediately below 2.7V under even light load, the cell is depleted and must be replaced.