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Hewlett Packard PowerWise 1250 UPS Battery Set
Hewlett Packard PowerWise 1250 Battery set
The replacement battery set supplied by Battery Consulting for Hewlett Packard PowerWise 1250 UPS system consists of FOUR 12V 7Ah batteries, from Sigma Power Systems. The part no for each battery is SG1270T2 with T2 terminals. T2 terminal is a fast on type with a wider dimension of 0.250 inch. These rechargeable batteries guaranteed to meet or exceed OEM specifications.
The battery supplied by OEM is 7Ah battery set.
We assure 100% compatibility with original batteries supplier with Hewlett Packard PowerWise 1250 model UPS and you get best price and with highest quality. Each battery in this high capacity replacement battery set for Hewlett Packard PowerWise 1250 UPS has the following features.
|Model||Voltage (V)||Capacity (Ah)||Length (inch)||Width (inch)||Height (inch)||Weight (Lbs)||Terminals||Qty|
- Absorbent Glass Mat (AGM) Technology
- Maintenance-Free Design with Spill Proof Construction
- U.L. Recognized and CE Certified
- Brand New, Factory Fresh
- 1 Year Warranty
- We only supply the batteries on hardware. USE THE EXISTING WIRING HARDWARE TO CONNECT THEM.
Chemistry of Hewlett Packard PowerWise 1250 Battery Set
This is a SLA (Sealed Lead Acid) battery with rechargeable capability. Positive plate of Hewlett Packard PowerWise 1250 UPS battery high capacity battery is made up of lead di-oxide while that of negative plate is made up of lead. Positive and negative plates of the battery are separated by a glass mat. The electrolyte for this SLA battery is sulfuric acid, with the specific gravity of 1.300. The electrolyte is absorbed in the separator, glass mat. Hence it is called “AGM” for this battery technology.
Construction of 12V 7Ah Battery
Each high capacity battery in Hewlett Packard PowerWise 1250 consists of six 2V cells. These six cells are connected in series internally to give 12V. The case material is ABS plastic. The Cold Cranking Amp (CCA) rating for this battery is 135A. This battery has a nominal capacity of 22Ah at 20 hour rate. This means if you discharge the battery from a fully charged state at a current of 0.35 Amp (20 x 0.35 = 7) it will take 20 hours to reach the end of discharge voltage of 10.5 V.
Battery Consulting - Hewlett Packard PowerWise 1250 UPS
The equivalent battery supplied by Battery Consulting for high capacity Hewlett Packard PowerWise 1250 UPS battery is SG1290T2 from Sigma Power Systems.
12V 7Ah battery is used in many different applications like wheelchairs, scooters, Uninterruptible Power Supply (UPS), lawn mower, emergency lights, and security systems and also in solar applications. Generally SLA battery design life is about five years at 25 C or 77F. When the temperature of operation is high then the battery life will be reduced. Also number of times the battery is charged and discharged will have an impact on the life of the battery also.
Life improving Tips for Hewlett Packard PowerWise 1250 battery:
Correct charge voltage is critical for the life of the battery. Higher than recommended charge voltage can reduce the life of the battery depending on the charging time. Charging at lower voltage will result in lower capacity and also reduce the life. Recommended charge voltages are printed on the battery for both cyclic and standby applications.
The capacity of SLA battery will increase with temperature and will have reduced capacity at lower temperatures. SLA batteries get discharged slowly when not connected to power source, called self-discharge. Leaving the battery without charge over a long period of time can reduce the open circuit voltage of the battery may damage the battery permanently. Also leaving the battery under discharged conditions for a long period of time will damage the battery permanently.
Higher temperatures will cause higher rate of grid corrosion and hence reduction in battery life.
Cycle life of the 12V 7Ah SLA battery is about 250 when discharged to 100%. Shallow discharge conditions will increase the cycle life.
Discharging the SLA batteries below 10.5V at slow discharge can also damage the batteries. This is called over-discharge Usually there will be a low voltage disconnect installed in the UPS systems to stop the battery discharge below certain voltage depending upon the system design. If you are using the batteries without low voltage disconnect make sure the discharge is stopped at or above 10.5V per battery.
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