Battery Tender Deltran Battery Tender 12V 800 Milliamp User Manual

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12 Volt Models: 800 Milliamp and 1.25 Amp

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS: This manual contains

important safety and operating instructions for the WATERPROOF

DELTRAN BATTERY TENDER®, 12 Volt 800 Milliamp and 12 Volt

1.25 Amp International Battery Chargers. CAREFULLY READ THESE

INSTRUCTIONS BEFORE USING THE BATTERY CHARGER.

WARNING AND CAUTION LABEL DEFINITIONS:

WARNING

WARNING indicates a potentially hazardous situation, which, if

not avoided, could result in serious injury or death.

CAUTION

CAUTION indicates a potentially hazardous situation, which, if not

avoided, may result in minor or moderate injury.

CAUTION

CAUTION used without the safety alert symbol indicates a

potentially hazardous situation that if not avoided, may result in

property damage.

GENERAL PRECAUTIONS

WARNING

Battery posts, terminals and related accessories contain lead and

lead components, chemicals known to the State of California to

cause cancer and birth defects or other reproductive harm.

Always wash your hands after handling these devices.

WARNING

Do not operate the battery charger with damaged AC power cords

or plugs or DC output cords or accessories - Replace accessories

immediately. Since neither the AC power cord nor the DC output

cord can be replaced, if either cord is damaged the battery

charger should be scrapped.

Deltran Battery Tender

WATERPROOF

International Battery Chargers

CAUTION

WORKING WITH LEAD ACID BATTERIES AND BATTERY CHARGERS:

All lead acid batteries have the potential to emit gasses that may combine into

a combustible or explosive mixture. In many cases, it is possible that lead acid

batteries will emit these gasses during normal discharge and charging

operations. Because of this potential danger, it is important that you follow the

precautions recommended by both the battery and battery charger

manufacturers before using either one.

USING MANUALS: Study all of the battery manufacturer's precautions and

specific recommendations for safe operation such as not removing cell caps

while charging and the recommended rates of charge (charger output current).

CAUTION

CHARGER LOCATION: LOCATE the charger as far away from the battery as

is allowed by the length of the output cable harness. NEVER set the charger

above the battery. NEVER set the charger on a surface constructed from

combustible material.

CHARGER VOLTAGE COMPATIBILITY: NEVER use a battery charger

unless the battery voltage matches the output voltage rating of the charger.

For example, do not use a 12-volt charger with a 6-volt battery and vice-versa.

EXCESSIVE MOISTURE: The charger body and power cords are fully

waterproof. However, do not expose the AC and DC electrical connections at

the ends of the power cords to rain or snow.

CHARGER ATTACHMENTS: Do not use attachments that are not

recommended or sold by Deltran or its affiliates. To do otherwise may result in

the risk of electric shock, fire, or possibly some other unforeseen potential

personal injury situations.

HANDLING POWER CORDS: When handling electric power cords, always

pull by the plug rather than by the cord. This will reduce the risk of damage to

both the plug and cord, and it will minimize the likelihood of electric shock

resulting from that damage.

LOCATION OF POWER CORDS: Make sure all electric power cords are

located so that they cannot be stepped on, tripped over, or otherwise

subjected to damage or stress.

MONITORING SEALED & NON-SEALED BATTERIES: When leaving a

battery charger connected to either a sealed (AGM or GEL) or non-sealed

(flooded battery) for extended periods of time (weeks, months, etc.),

periodically check the battery to see if it is unusually warm. This is an

indication that the battery may have a weak cell and that it could go into a

thermal runaway condition. If the battery releases an excessive amount of gas

or if the battery gets hotter than 130°F (55°C) during charging, disconnect the

charger and allow the battery to cool. Overheating may result in plate

distortion, internal shorting, drying out or other damage. For flooded batteries,

also check individual cell fluid levels against manufacturer's recommendations

for safe operation.

Questions and Answers:

T
theresamarshallJul 31, 2025
Why does the green light go on immediately when AC power is applied to my Battery Tender Deltran Battery Tender 12V 800 Milliamp Other?
- D
  Derek NielsenJul 31, 2025
  If the green light on your Battery Tender Other goes on immediately when AC power is applied, it could mean that the charger connections at the battery are unstable, the battery is defective, or the battery might already be fully charged.
S
Sarah GarnerAug 15, 2025
How to troubleshoot if neither of the charger lights turn on for Battery Tender Deltran Battery Tender 12V 800 Milliamp Other?
- R
  Robert ForbesAug 15, 2025
  If neither of the charger lights turn on after connecting the AC power plug of your Battery Tender Other to the AC electrical outlet, check the AC power plug connection at the outlet. Ensure the outlet is working by plugging in another appliance or using a voltmeter. For the 0.8 A model, also ensure the charger output is properly connected to the battery.

Battery Tender Deltran Battery Tender 12V 800 Milliamp Specifications

General

Brand	Battery Tender
Model	Deltran Battery Tender 12V 800 Milliamp
Category	Other
Language	English

Summary

Important Safety Instructions

Warning and Caution Label Definitions

Explains the meaning of WARNING and CAUTION labels used in the manual for hazard identification.

General Precautions

Outlines general safety measures and warnings for handling batteries and chargers, including electrical hazards.

Personal Precautions

Specific safety advice and protective measures when working near lead-acid batteries and handling tools.

Preparing to Charge

If Battery Must Be Removed From Vehicle

Step-by-step safety warnings and instructions for removing a battery from a vehicle before charging.

Additional Charger Information

Automatic Charging and Battery Status Monitoring

Details on the charger's automatic operation, charge modes, and status indicator lights.

Special Features

Highlights key features like sparkproof, short circuit, and reverse polarity protection.

Time Required to Charge a Battery

Information on charging rates and estimated time to recharge batteries of various capacities.

Working With a Dead Battery or Low Voltage

Guidance on charging batteries with very low voltages and understanding battery voltage indicators.

Status Indicator Lights

Explains the meaning of the amber and green status indicator lights during charging.

Troubleshooting Check List

Lights Not Turning On

Troubleshooting steps when neither the amber nor green charger lights turn on after AC power connection.

Green Light Immediately On

Diagnosing why the green charger light turns on immediately when AC power is applied.

Green Light Not On After Time

Troubleshooting when the green light does not illuminate within a reasonable charging time.

Amber Light Comes On After Green

Identifying causes for the amber light reappearing after the green light was initially on.

Specification Summary

Technical Specifications

Detailed electrical, operating, and dimensional specifications for the battery chargers.

Shipping Weight

Weights for the 0.8 Amp and 1.25 Amp charger models including accessories and packaging.

Acceptable Battery Cell Type, Number, and Ah Capacity

Lists compatible battery types, cell counts, and maximum Ah capacities for each charger model.