Chapter 21: Back-Up Battery; Overview; Storing Register Contents; Battery Life - HORNER APG XL10 PRIME OCS User Manual

MAN1029-10-EN_EXL10_XL10P_UM
CHAPTER 21: BACK-UP BATTERY
The following information pertains to the XL and RCC OCS units running 14.24 firmware and newer. This
does NOT apply to the Prime Series. Please refer to the next chapter for information on the Prime Series
backup battery.
NOTE: For more details on the back-up battery, refer to the Battery Manual [MAN1142].

21.1 Overview

The EXL10/XL10 PRIME has an advanced battery system that uses a rechargeable lithium-ion battery.
The battery powers the real time clock when power is removed and is needed for register data
retention. Does not include the XL10 Prime.

21.2 Storing Register Contents

The OCS controllers with rechargeable batteries write register data to high speed RAM when connected
to DC power. When this power is lost, critical circuits switch over and run on batter power for about
1/10 of a second. During this time, register and other retentive data is saved away to flash memory. The
clock continues to run on the battery at a much lower power. The battery is designed to last well over a
year in this state. Once power is restored, the battery recharges in eight (8) hours or less.

21.3 Battery Life

The battery is designed to last 300 full charges to 1000 partial charge cycles or 7 to 10 years. Because
typical operation does not drain the battery, the 1000 charge cycles should never be reached and the 7
to 10 year aging of the battery would limit its useful life. The battery is designed to be replaced.

21.4 Lithium Battery Safety

Many of the publicized battery issues are a result of using multiple batteries of flexible battery packs.
The OCS uses a small, single cell in a metal enclosure. The battery is UL recognized and comes from
quality suppliers. The OCS has safety circuitry built into the charging IC and additional external
protection including fusing. These circuits were closely evaluated by UL and Horner engineering for use
in hazardous environments.
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