Specifications
4
The heart of any UPS is the battery.The maintenance-free,sealed,lead-acid cells used in
virtually all manufacturers’UPSs have a two- to four-year life expectancy.When the batteries
die,the UPS is no longer uninterruptible,leaving its user unprotected in the event of a
power failure.Compaq’s Enhanced Battery Management is a proprietary technology that
doubles battery service life,provides up to a 60-day advance warning of pending battery
failure,and offers the fastest safe recharge time — increasing the return on your UPS
investment.This innovative technology is comprised of three components:
Double Battery Service Life with Intelligent Battery Charging
All UPS batteries need charging.Extended charging,however,significantly shortens battery
life.The Compaq UPS utilizes a patented three-stage charging process that ultimately doubles
battery service life.First,the Compaq UPS rapid charges the battery to 90%.A constant
voltage (float charge) continues until the battery reaches full capacity.The charger is then
turned off and the Compaq UPS goes into a rest mode,enabling the battery to be preserved
for future power failures. Most manufacturers use a trickle-charging method (a constant
voltage feeding a low current to the battery) which dries the electrolyte and corrodes the
plates,reducing potential battery life by up to 50%.
Advance Notification of Battery Replacement with Sophisticated
Monitoring Techniques
All batteries will eventually fail.Because UPS batteries are valve-regulated,sealed,lead-acid
cells,there has not been a practical way to provide users with advance notification of battery
failure.The only way to determine that batteries needed replacing was to wait until the power
failed,taking the servers and computers down with it.Compaq’s Enhanced Battery Management
is the only technology available that reliably provides advance notification prior to battery fail-
ure.The Compaq UPS microprocessor periodically initiates a brief discharge cycle to check the
internal impedance of the battery.This impedance is calculated and compared to an ideal bat-
tery state,indicating to the user,well in advance,when battery replacement is necessary.
Minimize Battery Use with Superior Voltage Regulation
Most manufacturers’UPSs monitor input voltage variations as low as -25%,but transfer to
battery when a surge or a sag needs to be filtered in the system.This type of voltage regulation
shortens the UPS’s battery service life.Compaq’s innovative Buck/Double Boost voltage
regulation ensures consistent input voltage to the load by automatically “bucking”it if it is
too high,or “boosting”it if it is too low.Voltage variations as low as -35% or as high as +20%
are corrected — without transferring to battery.This reduces the number of charge/recharge
cycles, thereby prolonging the life of the Compaq UPS battery.
UPS w/EBM*
UPS w/Trickle
Charge
*EBM = Enhanced Battery Management
Battery
Enhanced Battery Management Ensures
Ultimate, Long-Term Battery Reliability