# WP WATT Series

> LONG WP Watt AGM high-rate 12V rack UPS APC, Eaton. 21-150 W/cell. WP21W-12, WP90W-12, WP150W-12. 24h delivery.

**Category:** [Start](https://baterias.com/gb/beginning) → [Batteries](https://baterias.com/gb/batteries) → [Long batteries](https://baterias.com/gb/long-batteries)

- **Canonical URL**: https://baterias.com/gb/wp-watt-series
- **Language**: en-GB

## Description

**LONG WP Watt Series batteries**: high-rate 12V AGM optimised for fast discharge in rack UPS. 21W-150W per cell. Effective 5-40 Ah depending on rate.
Vs standard WP, delivers 30-50% more peak watts for 5-15 minutes — ideal for peak loads and data centers.

## LONG WP Watt — high-rate AGM

Watt range turns standard WP into a fast-discharge battery: thinner, more numerous plates, more active surface per volume unit. Spec is watts per cell at 15-min: WP21W = 21 W/cell for 15 min.
Code W/cell 15min Eq. Ah Application
WP21W-12 21 5 1U rack small UPS
WP50W-12 50 9 SMB rack UPS
WP90W-12 90 17 Server UPS
WP150W-12 150 40 Data center UPS

### Compatible UPS

- APC Smart-UPS RT, SRT
- Eaton 9SX, 9PX rack
- Riello Sentinel Tower

### **Watt or Ah?**

Rack UPS is rated in watts per cell at 15-min, not Ah. If your UPS says "21W/cell min", fit at least WP21W-12.

### **Use in non-rack UPS?**

Yes, but you lose the peak premium. For low prolonged use, standard WP is more efficient.

LONG WP Watt catalogue curated by our technical team. **10,976 Trustpilot reviews · 4.4/5**. 24h mainland delivery, free 14-day returns.

## Products in this category

| Product | Brand | Price |
|---|---|---|
| [Stationary battery Long WP1236W 12V 9Ah AGM](https://baterias.com/gb/battery-long-wp1236w-12v-9ah-36wh) | LONG | 18,54 € |
| [Long WP7-12(28W) stationary UPS battery 12V 7Ah AGM](https://baterias.com/gb/battery-long-wp7-1228w-12v-7ah-28wh) | LONG | 21,19 € |

## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries.

→ https://baterias.com/gb/technical-team

---
*baterias.com — Automotive batteries · 2026-08-04*