FDK CR14250SE

FDK CR14250SE 1/2 AA Lithium (3V) Battery

The FDK CR14250SE is a compact, primary lithium manganese dioxide cell designed for long-duration, low-to-moderate current applications such as PLC and RTC memory backup, sensors, security devices, and handheld instruments. Its 1/2 AA footprint (about 14.5 × 25 mm) fits tight enclosures while delivering stable 3V output and very low self-discharge.

Key details

When to choose

• You need a compact primary 3V source for backup power (PLCs, RTCs, memory) or low-duty sensors.
• Average current is generally below ~100–200 µA, with infrequent short pulses.
• Device must operate reliably after long storage or long idle periods.
• Operating temperatures range widely, and service intervals are long.

When to avoid

• Average current near or above ~1 mA, or frequent high pulses without local capacitance. Consider a larger CR cell (e.g., CR123A) or a different chemistry.
• You need rechargeability. This is a primary (non-rechargeable) cell.
• Your device requires 3.6 V nominal. Consider Li‑SOCl2 (ER14250, 3.6 V) if compatible with the higher voltage and pulse behavior.

Runtime planning (quick estimates)

Approximate service life at 20°C using ~850 mAh as a planning figure. Real results depend on cut-off voltage, pulse profile, and temperature.

Integration and design tips

• Characterize your current profile (sleep, wake, transmit) over temperature; estimate life from average current and de-rate for cold operation.
• Set firmware cutoffs conservatively to avoid deep discharge and unexpected resets.
• Use tabbed versions or holders with firm retention in vibration-prone equipment.
• Keep storage temperatures moderate; prolonged heat accelerates aging.
• Document install dates and calculated life; replace proactively in critical systems.

Alternatives and compatibility

• More capacity, still 3V: CR123A or 2× CR2 (if space allows).
• Higher energy density: Li‑SOCl2 ER14250 (3.6 V) for long life and wider temperature use, but confirm your device tolerates 3.6 V and pulse behavior.
• Not substitutes: 14500 Li‑ion (3.7 V), AA NiMH (1.2 V), or alkaline AA (1.5 V) without a designed regulator—voltages and curves differ.

Safety and handling

• Do not recharge, short-circuit, crush, or incinerate.
• Install with correct polarity; do not mix old and new cells or different brands/chemistries in one device.
• Use insulated tools when tab-welding or soldering tabbed cells; avoid heating the cell body.
• Follow local regulations for disposal and shipping of primary lithium batteries.

FAQ

• Is the CR14250SE rechargeable? No. It is a primary (single-use) lithium manganese dioxide battery.
• Can it deliver high pulse currents? Yes, for short pulses when paired with a suitable low‑ESR capacitor. Size the capacitor to meet your peak load and verify at cold temperatures.
• What shelf life should I expect? With proper storage at room temperature, cells remain usable for many years. Always check open-circuit voltage and date codes before deployment.
• Will it fit a standard 1/2 AA holder? Yes. The cell follows the 1/2 AA form factor; verify polarity and terminal style (bare vs. tabbed) for your holder or PCB.
• What if I need 3.6 V instead of 3.0 V? Consider ER14250 (Li‑SOCl2, 3.6 V) if your device can accept the higher voltage; otherwise stay with CR chemistry or use a regulator.