Varta Memory Protection Battery - 3/V250H
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Product Information
Full details
The Varta 3/V250H is a high-performance NiMH button cell battery designed for engineers and hobbyists requiring reliable power for memory backup, real-time clocks, and portable lighting applications. This battery offers excellent overcharge stability and broad temperature tolerance, making it a robust choice for mission-critical electronics; however, it requires specialized soldering skills due to its integrated PCB pins for permanent board mounting.
All features
| Model Part Number | 3/V250H |
|---|---|
| Brand | Varta |
Extended Product Information
FAQs
Can I replace a standard alkaline battery with the 3/V250H?
No. This is a rechargeable NiMH battery designed for specific circuits that provide charging current. Using it in a non-rechargeable device will lead to failure.
What is the primary chemistry of this battery?
The 3/V250H is a Nickel Metal Hydride (NiMH) battery.
Does this battery require a specific type of charger?
Yes, it requires a charger compatible with NiMH cells, typically found in circuits designed for memory backup.
Can I remove the PCB pins?
No, the pins are integrated into the battery housing. Removing them will likely damage the cell.
What is the expected lifespan of this battery?
Lifespan depends heavily on the discharge frequency and ambient temperature, but it is optimized for high-cycle longevity in memory backup applications.
Is it safe to solder directly to the battery terminals?
The battery is supplied with pins specifically to prevent the need for soldering directly to the battery casing, which can be dangerous.
Troubleshooting
Battery failing to hold charge
Verify that your device's charging circuit provides the correct voltage and current for NiMH chemistry.
Voltage reads lower than 3.6V
The battery may be in a deep discharge state; leave it on a low-current trickle charge for 24 hours to recondition.
Terminal connection feels loose
Reflow the solder joints on the PCB to ensure a firm, low-resistance mechanical and electrical bond.
Pros and Cons
Pros
- Reliable memory retention for sensitive electronics
- Excellent resistance to overcharging
- Compact and lightweight design (33g)
- Wide operating temperature range
- Easy integration with PCB pin layout
Cons
- Requires soldering for installation
- Not intended for user-swappable compartments
- Fixed terminal configuration limits mounting flexibility
Setup, Compatibility & Care
Installation requires standard soldering practices as the unit features dedicated PCB pins. Ensure your circuit board layout matches the physical dimensions of 20.1mm x 26mm x 25.1mm to avoid mechanical stress on the terminals.
- Preparation: Clean the PCB mounting points to ensure a low-resistance connection.
- Soldering: Use a temperature-controlled iron to secure the PCB pins quickly, minimizing heat transfer into the battery casing.
- Compatibility: Ensure your charging circuit is configured for NiMH chemistry to maintain the 3.6V nominal voltage standard.
- Care: Store in a cool, dry place if not immediately used. Avoid short-circuiting the terminals, as this may permanently damage the cell's internal chemistry.