The DataSafe® HX Top Terminated Batteries from EnerSys are a range of Valve Regulated Lead Acid (VRLA) batteries built for Information Technology and Uninterruptible Power Supply (UPS) applications. Available in 6 V and 12 V blocks from 4.5 to 200 Ah, they pair high reliability and long service life with a compact footprint, making them a dependable reserve-power source for protecting critical systems.
Overview
DataSafe HX top terminated batteries are engineered to protect vital equipment, combining a set of design features that maximize reliability while delivering strong performance and excellent service life. Their gas-recombination VRLA chemistry keeps gas evolution to a minimum, which means they can be installed in cabinets or on stands—in offices or close to the equipment they protect—so sites can make better use of available space while cutting storage and maintenance costs. The result is a battery that delivers high performance in less space than conventional standby power batteries.
Key features and benefits
- Positive and negative plate grids in a lead-calcium-tin alloy for long life and efficient recharge.
- Flame-retardant case (UL94) and cover that meet UL1778.
- Individual flame-arresting cell vents.
- Hermetically sealed containers and covers for leak resistance across the life of the product.
- AGM separators that fully absorb the electrolyte.
- High-performance brass threaded receptacle, bolt, and faston terminals.
- Increased energy density.
- Computer-optimized electrochemistry for higher power output down to the 15-minute rate at 1.67 volts per cell.
- 100% initial battery capacity.
Construction
- High-conductivity terminals — brass insert with threaded receptacle (HX80–HX800), bolt terminal (HX80–HX150), or faston tab (HX25–HX50) for maximum conductivity and easy installation.
- High-integrity terminal seal — compression grommet (HX205–HX800) or dual welded/epoxy seal (HX25–HX150) designed for long life.
- Self-regulating relief valve — a low-pressure non-return valve that prevents atmospheric oxygen from entering the cell.
- Rugged high-performance positive plates — grids designed to resist corrosion and prolong active life.
- Balanced negative plates — tuned for optimum recombination efficiency.
- Tough cell containers — thick-wall plastic that resists shock and vibration, with flame-retardant material as the standard offering.
- Separators — low-resistance microporous Absorbent Glass Mat (AGM) that holds the electrolyte.
Electrical specifications
| Type | Voltage (V) | Nominal capacity — 8 hr rate to 1.75 Vpc (Ah) | Watts/cell — 15 min rate to 1.67 Vpc | Short-circuit current (A) | Max discharge current — 2 min rate (A) | Internal resistance (mΩ) |
|---|---|---|---|---|---|---|
| 12HX25 | 12 | 4.5 | 23 | 300 | 41 | 16.5 |
| 12HX35 | 12 | 7 | 36 | 500 | 62 | 13.2 |
| 6HX50 | 6 | 11 | 53 | 720 | 93 | 6.1 |
| 12HX50 | 12 | 11 | 53 | 720 | 93 | 12.2 |
| 12HX80 | 12 | 16 | 80 | 1000 | 140 | 8.5 |
| 12HX100 | 12 | 21 | 100 | 1500 | 171 | 7.1 |
| 12HX135B | 12 | 28 | 135 | 1800 | 238 | 5.6 |
| 12HX135R | 12 | 28 | 135 | 1800 | 238 | 5.6 |
| 12HX150 | 12 | 32 | 150 | 2400 | 277 | 5.0 |
| 12HX205 | 12 | 44 | 205 | 2775 | 439 | 4.5 |
| 12HX300 | 12 | 70 | 284 | 3175 | 503 | 3.9 |
| 12HX330 | 12 | 82 | 336 | 3700 | 586 | 3.4 |
| 12HX400 | 12 | 94 | 381 | 4225 | 670 | 3.0 |
| 12HX505 | 12 | 119 | 506 | 4510 | 913 | 2.8 |
| 12HX540 | 12 | 123 | 540 | 4775 | 961 | 2.6 |
| 6HX800 | 6 | 200 | 780 | 6200 | 1272 | 1.0 |
Internal resistance values are for reference only and are not intended to represent an ohmic value or baseline measurement.
Physical specifications
| Type | Overall height (incl. terminal) | Width | Length | Typical weight | Layout | Terminals |
|---|---|---|---|---|---|---|
| 12HX25 | 107 mm (4.2 in) | 70 mm (2.8 in) | 90 mm (3.5 in) | 2.0 kg (4.4 lb) | 1 | A/B |
| 12HX35 | 100 mm (3.9 in) | 65 mm (2.6 in) | 151 mm (5.9 in) | 2.8 kg (6.1 lb) | 3 | A/B |
| 6HX50 | 99 mm (3.9 in) | 50 mm (2.0 in) | 151 mm (5.9 in) | 2.1 kg (4.7 lb) | 1 | A/B |
| 12HX50 | 99 mm (3.9 in) | 99 mm (3.9 in) | 152 mm (6.0 in) | 4.1 kg (9.1 lb) | 3 | A/B |
| 12HX80 | 167 mm (6.6 in) | 76 mm (3.0 in) | 181 mm (7.1 in) | 6.4 kg (14.0 lb) | 2 | C/E |
| 12HX100 | 175 mm (6.9 in) | 125 mm (4.9 in) | 166 mm (6.5 in) | 10.0 kg (22.0 lb) | 2 | C/E |
| 12HX135B | 180 mm (7.1 in) | 130 mm (5.1 in) | 198 mm (7.8 in) | 11.8 kg (26.0 lb) | 1 | F |
| 12HX135R | 169 mm (6.7 in) | 130 mm (5.1 in) | 196 mm (7.7 in) | 11.8 kg (26.0 lb) | 1 | C |
| 12HX150 | 170 mm (6.7 in) | 165 mm (6.5 in) | 197 mm (7.8 in) | 14.5 kg (32.0 lb) | 2 | D/F |
| 12HX205 | 206 mm (8.1 in) | 140 mm (5.5 in) | 226 mm (8.9 in) | 19.5 kg (43.0 lb) | 1 | D |
| 12HX300 | 208 mm (8.2 in) | 175 mm (6.9 in) | 259 mm (10.2 in) | 27.2 kg (60.0 lb) | 1 | D |
| 12HX330 | 213 mm (8.4 in) | 173 mm (6.8 in) | 300 mm (11.8 in) | 32.2 kg (71.0 lb) | 1 | D |
| 12HX400 | 211 mm (8.3 in) | 173 mm (6.8 in) | 338 mm (13.3 in) | 36.3 kg (80.0 lb) | 1 | D |
| 12HX505 | 272 mm (10.7 in) | 173 mm (6.8 in) | 338 mm (13.3 in) | 46.7 kg (103.0 lb) | 1 | D |
| 12HX540 | 272 mm (10.7 in) | 173 mm (6.8 in) | 338 mm (13.3 in) | 48.1 kg (106.0 lb) | 1 | D |
| 6HX800 | 211 mm (8.3 in) | 173 mm (6.8 in) | 340 mm (13.4 in) | 36.3 kg (80.0 lb) | 4 | D |
All dimensions are given at +/-0.08 in (2 mm) and include the terminal.
Constant power discharge to 1.67 Vpc at 77 °F (25 °C)
Watts per cell available over the listed standby times (minutes):
| Type | 5 min | 10 min | 15 min | 20 min | 30 min | 45 min | 60 min |
|---|---|---|---|---|---|---|---|
| 12HX25 | 45 | 29 | 23 | 18 | 13 | 10 | 8 |
| 12HX35 | 71 | 46 | 36 | 28 | 20 | 15 | 12 |
| 6HX50 | 110 | 71 | 53 | 44 | 32 | 23 | 18 |
| 12HX50 | 110 | 71 | 53 | 44 | 32 | 23 | 18 |
| 12HX80 | 157 | 102 | 80 | 62 | 46 | 33 | 26 |
| 12HX100 | 197 | 127 | 100 | 78 | 57 | 41 | 33 |
| 12HX135 | 265 | 172 | 135 | 105 | 77 | 56 | 44 |
| 12HX150 | 295 | 191 | 150 | 117 | 85 | 62 | 49 |
| 12HX205 | 412 | 274 | 205 | 164 | 119 | 85 | 67 |
| 12HX300 | 558 | 373 | 284 | 231 | 174 | 128 | 102 |
| 12HX330 | 637 | 435 | 336 | 276 | 206 | 150 | 119 |
| 12HX400 | 722 | 498 | 381 | 313 | 232 | 170 | 136 |
| 12HX505 | 877 | 653 | 506 | 412 | 301 | 218 | 173 |
| 12HX540 | 930 | 691 | 540 | 444 | 326 | 236 | 186 |
| 6HX800 | 1320 | 977 | 780 | 652 | 494 | 365 | 291 |
Full constant-power discharge tables are also published at end voltages of 1.60, 1.63, 1.65, 1.70, and 1.75 Vpc. Rates are subject to change without notice.
Charging and operating parameters
- Normal operating temperature range: −4 °F (−20 °C) to 122 °F (50 °C).
- Float charging voltage: 2.25–2.28 volts per cell at 77 °F (25 °C).
- Charging current: can be safely recharged at high current rates.
- Storage time: up to 6 months at 77 °F (25 °C) before a freshening charge is required; this interval shortens at higher temperatures.
- Orientation: designed to be installed on their base — consult your local EnerSys dealer before installing in any other orientation.
Torque specifications
- M5 receptacle: 31 in-lbs (3.5 Nm) ±5%.
- M6 receptacle (HX80–HX150): 44 in-lbs (5 Nm) ±5%.
- M6 receptacle (HX205–HX800): 60 in-lbs (6.8 Nm) ±5%.
- M5 bolt: 40 in-lbs (4.5 Nm) ±5%.
- M6 bolt: 58 in-lbs (6.5 Nm) ±5%.
Standards and approvals
- UL listed — File No. MH16464 (HX25–HX150) or MH12544 (HX205–HX800).
- Manufactured to EnerSys standards in ISO 9001 registered production facilities worldwide.
- Approved for shipping as non-hazardous, non-spillable per IATA Special Provision A67 and 49 CFR.
Cabinets and racks
DataSafe 12 V HX top terminal batteries can be housed in matching cabinets and racks. The 12 V HX battery cabinets are available in UBC at or below-grade Rated Zone 4 (Zone 4 data sheet US-HXCAB-RS; Zone 0 is not applicable). The 12 V HX battery racks are available in UBC Zone 0 as well as at or below-grade Rated Zone 4, with data sheets by model:
| 12 Volt battery | Zone 0 data sheet | Zone 4 data sheet |
|---|---|---|
| 12HX205 | US-UAAx-RK | US-UJAx-RK |
| 12HX300 | US-UABx-RK | US-UJBx-RK |
| 12HX330 | US-UACx-RK | US-UJCx-RK |
| 12HX400 | US-UADx-RK | US-UJDx-RK |
| 12HX505 / 12HX540 | US-UAEx-RK | US-UJEx-RK |
| 6HX800 | US-UAFx-RK | US-UJFx-RK |
Cabinet accessories and inter-unit/inter-tier connections are included in cabinet pricing, sized at the 15-minute discharge rate to 1.67 V/cell end voltage. Rack accessories vary by site application and are quoted and sold separately once the system is sized.