Ultralife High Energy Lithium Battery UHE-ER14505-H 3.6V 2.4Ah (AA Bobbin)

The Ultralife UHE-ER14505-H is a primary lithium battery optimized for capacity in the widely used AA format (Mignon). It belongs to the "High Energy" series and, unlike the previously discussed UHR series, uses the Bobbin technology (bobbin construction). This means it is not designed for high currents, but for maximum energy density and extremely long running times. It is the ideal "long-term battery" for devices that need to be supplied with low currents for years without requiring a battery change.

Highlights at a glance

• Maximum capacity in AA format: Offers with 2.4 Ah a significantly higher energy quantity than the high-current variant (UHR, approx. 2.0 Ah) or conventional alkaline batteries, ideal for extremely long operating times.
• Bobbin technology: The internal design minimises self-discharge and maximises the amount of active lithium, perfect for applications with low discharge currents (a few milliamperes or microamperes).
• 10+ year lifetime: Thanks to the extremely low self-discharge (< 2 % per year), this battery can supply devices for a whole decade before it needs to be replaced.
• Constant voltage: The voltage of 3.6 V remains stable over almost the entire discharge cycle (flat discharge curve), which makes electronics development easier.
• Extreme temperature range: Can be used from -55 °C to +85 °C, making it the standard choice for outdoor sensors.
• High safety: The hermetically sealed stainless steel housing and the stable chemistry (Li-SOCl2) ensure safety even under harsh conditions.

The standard for smart home & sensors

The UHE-ER14505-H is the standard battery for wireless sensors (e.g. window contacts, temperature sensors), heat cost allocators, smoke detectors (10-year models) and memory backup (CMOS/RAM) in computers and industrial controllers. Wherever a device hangs on the wall or is installed for years and only rarely "wakes up", this battery is the right choice.
 

Features

FAQs for Ultralife UHE-ER14505-H

What is the key difference to the UHR-ER14505?

This determines whether your device works or fails:

• UHE (your battery): "Energy" (bobbin). High capacity (2.4 Ah), but low current. Ideal for sensors that only measure data or retain memory.
• UHR (Spiral): "Power" (spiral). Less capacity (2.0 Ah), but high current. Necessary for GSM/LTE modules or motors. If you insert the UHE into a GPS tracker with GSM modem, the voltage will collapse while sending.

Can I use it as a replacement for normal AA batteries?

Warning: No! Normal AA batteries have 1.5 volts. This battery has 3.6 volts. That's more than double! If you put this in a remote control, a wall clock or a toy, you'll destroy the device immediately. It may fit mechanically, but it is not electrically compatible.

What is passivation?

When these batteries are stored for a long time, a protective layer forms inside (passivation). This is good for durability (no self-discharge), but when you put the battery into operation, the voltage may be low for a few milliseconds before it jumps to 3.6 V. Some sensitive devices then incorrectly display "battery low".

Is the battery rechargeable?

No. It is a primary battery. Rechargeable lithium batteries in AA size usually have 3.7 V (Li-Ion 14500) or 1.2 V (NiMH) and a completely different chemistry. This cell must not be charged.