When your business relies on continuous power, the health of your UPS (Uninterruptible Power Supply) batteries isn’t something to leave to chance. Choosing the right battery ensures your systems stay protected during mains failures, and Yuasa ENL UPS batteries are among the most trusted in the industry.
Whether you’re replacing existing units, upgrading your backup, or simply planning ahead, this guide will walk you through everything you need to know about the Yuasa ENL range. We also explore how to choose the right model, and where to buy with confidence.
Why Yuasa ENL UPS Batteries?
Yuasa is one of the world’s largest and most respected battery manufacturers. Their ENL (Extended Life) series is specifically designed for high-performance UPS systems and critical backup applications.
Here’s what sets the Yuasa ENL range apart:
- Designed for long life – up to 12 years design life under Eurobat classification.
- High reliability – trusted for use in hospitals, data centres, and emergency systems.
- Low self-discharge – ideal for standby use.
- Sealed, maintenance-free AGM construction – safe for installation in office and server room environments.
- Available in a wide range of sizes – suitable for most UPS models on the market.
How Long Do Yuasa ENL Batteries Last?
While the ENL series is rated for a 10–12 year design life, how they’re used and environmental factors affect lifespan. In practice, replacement every 3 to 5 years is common, especially in environments with higher ambient temperatures or heavy discharge cycles.
Replacing batteries before failure is the most reliable way to ensure your UPS actually provides backup when you need it. The cost of downtime or damage to equipment from a failed backup system often far outweighs the cost of a scheduled battery replacement.
How to Choose the Right Yuasa ENL Battery
To find the correct replacement, you’ll need at least one of the following:
Your UPS Make and Model
Most UPS systems are designed to work with specific sizes of battery or kits. If you know your UPS model (e.g. APC Smart-UPS 3000, Riello Sentinel Pro), you can use our battery lookup tool to match it with the correct ENL battery type.
Your Existing Battery Part Number
If you’re replacing an old unit, check the label on the battery for a part number (such as ENL100-12FT or ENL65-12). These codes indicate the capacity (Ah) and voltage (always 12V in this range).
Physical Dimensions and Terminal Type
If labels are missing, you can identify the correct replacement by measuring the existing battery’s dimensions and checking the terminal type. Our team can assist if you’re unsure.
Popular Models in the Yuasa ENL Series
Here are some of the most common models we supply and install:
Model Capacity (Ah) Dimensions (mm) Typical Use
ENL65-12 65Ah 350 x 167 x 179 Mid-size UPS systems
ENL100-12FT 100Ah 407 x 174 x 238 Larger 3-phase UPS systems
ENL200-12 200Ah 522 x 240 x 219 Data centres, industrial UPS
ENL33-12 33Ah 196 x 130 x 171 Compact UPS units
These batteries all operate at 12V and use sealed AGM (Absorbent Glass Mat) construction for maintenance-free performance.
Should You Install Yourself or Use a Professional?
Some with smaller UPS units prefer to swap batteries themselves. While this is possible, there are some important things to consider:
- The weight of the battery – Larger ENL batteries can weigh over 30kg each.
- Risk of downtime – If done incorrectly, battery swaps can result in unprotected systems or even data loss.
- Electrical safety – Professional replacement ensures compliance with health and safety regulations.
At UPS Battery Shop, we offer both options:
- DIY Kits – Order online with next-day delivery for supported models.
- Professional Installation – Our engineers can replace batteries on-site, even out of hours, with zero disruption.
Disposal of Old Yuasa Batteries
Used UPS batteries are classified as hazardous waste and must be disposed of responsibly. As part of our replacement service, we will collect and remove old batteries and recycle them in accordance with UK waste regulations. We can provide a certificate of disposal if needed.
Why Buy from UPS Battery Shop?
We are a Yuasa Approved Distributor, which means:
- You’re getting genuine batteries, not grey market imports.
- Batteries are fresh from the factory, with full warranty.
- You have access to expert advice, technical support and installation services.
We also stock a wide range of Fiamm, CSB, APC, Eaton and Riello batteries, so if you’re not sure whether the Yuasa ENL range is the best fit, we can advise on alternatives.
Need Help Finding the Right Battery?
If you’re still unsure what battery you need, we’ve made it easy:
Use our Lookup Tool – just select your UPS brand and model.
Search by Part Number – enter your existing battery code.
Contact us– Our friendly team is happy to help.
01252 692559
batteries@sourceups.co.uk
