background image

 

 

f) 

For positive-grounded vehicle, connect NEGATIVE (BLACK) clip from battery 
charger to NEGATIVE (NEG, N, –) ungrounded post of battery. Connect POSITIVE 
(RED) clip to vehicle chassis or engine block away from battery. Do not connect clip 
to carburetor, fuel lines, or sheet-metal body parts. Connect to a heavy gage metal 
part of the frame or engine block. 

g) 

When disconnecting charger, turn switches to off, disconnect AC cord, remove clip 
from vehicle chassis, and then remove clip from battery terminal. 

h) 

See operating instructions for length of charge information. 

16)  FOLLOW THESE STEPS WHEN BATTERY IS OUTSIDE VEHICLE. A SPARK NEAR 

THE BATTERY MAY CAUSE BATTERY EXPLOSION. TO REDUCE RISK OF A 
SPARK NEAR BATTERY: 

a) 

Check polarity of battery posts. POSITIVE (POS, P, +) battery post usually has a 
larger diameter than NEGATIVE (NEG, N, –) post. 

b) 

Attach at least a 24-inch-long 6-gauge (AWG) insulated battery cable to NEGATIVE 
(NEG, N, –) battery post. 

c) 

Connect POSITIVE (RED) charger clip to POSITIVE (POS, P, +) post of battery. 

d) 

Position yourself and free end of cable as far away from battery as possible – then 
connect NEGATIVE (BLACK) charger clip to free end of cable. 

e) 

Do not face battery when making final connection. 

f) 

When disconnecting charger, always do so in reverse sequence of connecting 
procedure and break first connection while as far away from battery as practical. 

g) 

A marine (boat) battery must be removed and charged on shore. To charge it on 
board requires equipment specially designed for marine use. 

 

GROUNDING AND AC POWER CORD CONNECTION INSTRUCTIONS –  

Charger should be grounded to reduce risk of electric shock. Charger is equipped with an electric 
cord having an equipment-grounding conductor and a grounding plug. The plug must be plugged 
into an outlet that is properly installed and grounded in accordance with all local codes and 
ordinances. 
 

DANGER –

 Never alter AC cord or plug provided – if it will not fit outlet, have proper outlet installed 

by a qualified electrician. Improper connection can result in a risk of an electric shock. 
 
This battery charger is for use on a nominal 120-volt circuit, and has a grounding plug that looks like 
the plug illustrated in sketch A in Figure 1. A temporary adapter, which looks like the adapter 
illustrated in sketches B and C, may be used to connect this plug to a two-pole receptacle as shown 
in sketch B if a properly grounded outlet is not available. The temporary adapter should be used only 
until a properly grounded outlet can be installed by a qualified electrician. 
 

 

 

DANGER –

 Before using adapter as illustrated, be certain that center screw of outlet plate is 

grounded. The green-colored rigid ear or lug extending from adapter must be connected to a 
properly grounded outlet– make certain it is grounded. If necessary, replace original outlet cover 
plate screw with a longer screw that will secure adapter ear or lug to outlet cover plate and make 
ground connection to grounded outlet.

 

NOTE: 

USE OF AN ADAPTER IS NOT ALLOWED IN CANADA. IF A GROUNDING TYPE 
RECEPTACLE IS NOT AVAILABLE, DO NOT USE THIS APPLIANCE UNTIL THE 
PROPER OUTLET IS INSTALLED BY A QUALIFIED ELECTRICIAN

 

(A)

(B)

(C)

Grounding Pin

Cover of Grounded

Outlet Box

Metal Screw

Adapter

Grounding
Means

Figure 1

 

USER INSTRUCTIONS 

 

AUTOMATIC CHARGING AND BATTERY STATUS MONITORING: 

Battery Tender® 800 chargers are completely automatic and may be left 
connected to both AC power and to the battery that it is charging for long 
periods of time. The charger output power, voltage, and current depends 
on the condition of the battery it is charging. The Battery Tender

® 

800 

charger has a two-color LED indicator light that provides a visual means to 
determine the operating mode of the charger and hence the condition of 
the battery connected to the charger. 
 
The two-colored status indicator LED light is available to determine whether 
the charger is operating in one of the 4 primary charge modes: 

Qualification/Initialization mode:

 The Monitor Circuit verifies appropriate 

battery voltage levels and good electrical continuity between the battery 
and the charger DC output. The 

bulk mode

 (full charge, constant current, 

battery is 0% to 80% charged), the 

absorption mode

 (high constant 

voltage, battery is 80% to 100% charged), or the 

storage/float 

maintenance

 

mode

 (low constant voltage, battery is 100% to 103% 

charged). 
 
When the battery is fully charged, the LED will turn green and the charger 
will switch to a storage/maintenance charge mode. The Battery Tender

® 

800 charger will automatically monitor and maintain the battery at full 
charge. 
 

ATTENTION:  The Battery Tender

®

 800 CHARGER HAS A SPARK 

FREE CIRCUITRY. 

The output alligator clips or ring terminals will not spark 

when they are touched together. The Battery Tender

® 

800 charger will not 

produce an output voltage until it senses at least 3 volts from the battery. It 
must be connected to a battery with the correct polarity before it will start 
charging a battery. 

 

NOTE: 

THE OUTPUT CLIPS OR RING TERMINALS MUST BE CONNECTED TO 
A BATTERY BEFORE THE CHARGER CAN PRODUCE AN OUTPUT 
VOLTAGE. 

 

TIME REQUIRED TO CHARGE A BATTERY:

 

 

BATTERY AMP HOUR SIZE/CAPACITY 

10 to

20 Ah

25 to

40 Ah

45 to

65 Ah

70 to

95 Ah

100 to

155 Ah

160 to

185 Ah

190 to 

215 Ah 

Motorcycle, 

Watercraft, 

ATV, etc

 

Wheelchair, 

Electric Motor 

Assisted

 

Automotive,

Farm 

Equipment  

\SLI

Truck SLI,

Marine 

Trolling 

Motor

 

Marine, RV or 

Industrial 

Vehicle

 

Marine, RV or 

Industrial 

Vehicle

 

Marine, RV or 

Industrial 

Vehicle

 

7 to 13 

Hours

17 to 27

Hours

30 to 43

Hours

MAINTENANCE 

ONLY

 

MAINTENANCE 

ONLY

 

MAINTENANCE 

ONLY

 

MAINTENANCE 

ONLY

 

 
 

Reviews: