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HRB-U30-S100 

Replacement Batteries

Important Lead Acid Battery Information

Use protective eye wear when testing, charging and/or 

handling the batteries.

Do not attempt to disassemble batteries.

Contact with sulfuric acid may cause harm. Should contact 

occur, wash skin and/or clothes with liberal amounts of water.

Do not throw batteries into fire; batteries so disposed may 

rupture or explode.

Disassembled batteries are hazardous waste and must be 

treated accordingly.

Dispose of old batteries per local regulations

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IMPORTANT

Re-charging battery when not in use

Due to the self-discharge characteristics of this type of battery, if the 
battery is not being actively used it is imperative that you charge the 
battery for at least 12 hours every six months, at a minimum. Otherwise, 

permanent loss of battery capacity may occur.

8. Re-install the battery bar. If the bar has foam on one side, make 

sure the foam side faces down.

CAUTION

: Make sure the battery cable is routed below the battery 

bar as shown to avoid possible shorting hazard!

9. Re-install the logger into the enclosure. For U30/GSM and U30/Wi-Fi 
models, reconnect the antenna. For the U30/Ethernet model, reconnect 

the Ethernet cable. Plug in the Smart Sensors first, then the battery, and 
finally the external power source (AC adapter or solar panel).

10. Dispose of the old battery per local regulations. 

Doc #: 12696-E, Part #: MAN-HRB-U30

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Before You Begin - Testing the Battery

Before you install the battery, use a voltmeter to make sure it has an 
adequate charge. If the charge is less than 3.0 volts, charge the battery 
externally with a current-limited variable power supply. 

Hold the battery across a constant voltage source of 4.5 volts with a current 
limit of 1 Amp. It takes up to 24 hours to fully charge a dead battery.

IMPORTANT

: Do not apply more than 4.6 volts absolute maximum to the 

battery. Do not exceed 1 Amp of current when charging. If the battery gets 

hot, immediately stop charging the battery.

Inside this Package

- Replacement battery (1)

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