Small sealed lead-acid battery for burglar alarms and security panels that promises dependable standby power. Peace of mind for householders and installers comes from a recognised brand and compact format: Yuasa NP2.1-12 Battery. Is the specification and reported longevity a sensible choice for replacements?
⚡ At a Glance
- • Capacity and Chemistry: Valve-Regulated Lead-Acid, Absorbent Glass Mat (AGM), nominal 12V and 2.1Ah (listed as 2.3Ah in the name)
- • Best for: Replacing small sealed lead-acid batteries in burglar alarm and security control panels
- • Not ideal for: High-drain applications such as vehicle starter batteries or power tools
Compact VRLA AGM battery with a 12V, 2.1Ah rating and sealed construction. Dimensions are 178mm x 34mm x 64mm and weight is 0.82 kg, with a 12-month guarantee.
Reliable standby power – thanks to Valve-Regulated Lead-Acid AGM technology
Product description specifies Valve-Regulated Lead-Acid Absorbent Glass Mat (AGM) construction at 12V and 2.1Ah. AGM is a sealed format designed for standby use and regulated recombination of gases within the cell.
Consistent backup capacity suits alarm systems that need dependable power on mains failure. The sealed AGM format reduces the need for user maintenance.
Slim fit for narrow compartments – with compact dimensions and low weight
Listed dimensions are 178mm x 34mm x 64mm and the weight is 0.82 kg. The narrow profile matches common sizes used in alarm and security panels.
Easy to handle and straightforward to install in confined battery bays, making replacements quicker for installers or DIYers.
Proven longevity in real use – with positive user reports of multi-year service
User reviews describe simple installation and good quality, with one review specifically noting long-lasting performance of about five years.
Expect multi-year service in typical alarm duty based on customer feedback, so fewer replacement cycles and less maintenance hassle.
✨ The 4 Key Reasons for Yuasa NP2.1-12 Battery
- Compatibility with common part numbers – Fits many alarm units that accept NP2.1-12 and listed equivalents
- Sealed AGM design – Reduces maintenance and avoids electrolyte topping-up
- Compact dimensions – Suits narrow battery compartments for easy replacement
- Proven durability in reviews – Users report long service life, reducing replacement frequency
📋 Technical Details at a Glance
- Category: Electronics
- Voltage: 12V
- Capacity: 2.1Ah (marketed as 2.3Ah in name)
- Technology: Valve-Regulated Lead-Acid (Absorbent Glass Mat)
- Compatible Part Numbers: NP2.1-12; 6FM2; PS-1220; SP020; 4132; 4233
❓ Frequently Asked Questions
Q: Is the Yuasa NP2.1-12 Battery compatible with many alarm systems?
A: Compatibility is indicated by the listed part numbers: NP2.1-12, 6FM2, PS-1220, SP020, 4132 and 4233, so units accepting those equivalents should accept this battery.
Q: Does the battery require regular maintenance?
A: The specification names Valve-Regulated Lead-Acid Absorbent Glass Mat (AGM) technology, which is a sealed construction and does not require topping up of electrolyte.
Q: How long can the battery be expected to last in service?
A: User feedback highlights good longevity, with one review reporting about five years of service under typical alarm use.
🏆 Our Verdict
Suitable for homeowners, landlords and installers who need a compact, recognised-brand replacement for alarm system backup. The key selling point is sealed AGM construction combined with narrow dimensions and positive real-world lifespan reports. While availability and retail choice vary, the 12-month guarantee plus user-reported multi-year durability indicate reasonable long-term value.
