Battery Sentinel PLUS Car & Light Truck Charger (12 volt - 3 amp)

12 Volt 3 amp Constant Current Battery Charger
Equivalent to 6 amp tapered charger

Advanced built in circuitry protects against:
Reverse Polarity
Short Circuit
A/C Surge
Over-Voltage
Over-Current

Fully Automatic Suitable for 12 volt wet-lead-acid, Sealed-lead, gel, and absorbed mat and Switch-Mode Technology Batteries. One LED turns Yellow, then Green to Indicate charging status.

Compact – 4 1/2” L x 2 1/4” W x 1 1/4” H

Lightweight – only weighs 11 ounces

NOTE: This charger comes with two sets of leads, shown below. One has regular alligator clamps for normal manual connection at the battery posts/terminals. The other set has ring terminals on the ends. If your vehicle’s battery is difficult to get to (under a seat in the trunk etc) the ring terminal lead set can be permanently connected to your battery terminals or cables. The 42” long lead wire can then be routed to a convenient location where you simply plug & unplug the charger as required. The lead set has a two pin plug that cannot be reverse connected and is also fused for added protection. A safety cap (included) can be snapped in place to keep it clean and dry when charger is not in use.

The Most Advanced, Fully Automatic Charger Ever!
Battery Sentinel brand Battery Charger & Maintainer is Specifically Designed for Car, Light Truck, Recreational & Utility Vehicle Batteries. Solid State Technology Keeps Batteries Fully Charged & living Years Longer.

NEVER WORRY ABOUT OVERCHARGING AGAIN!

JUST “PLUG US IN”
THE BUILT IN PROTECTION SYSTEM WILL TAKE CARE OF THE REST

SAFETY!
SUPERIOR Technology means you’ll never have to worry about OVERCHARGING again.
Just connect your battery charger and keep your battery fully charged!

SPEED!
Our Constant current switching technology charges batteries faster!

SAVINGS!
Battery Sentinel prolongs battery life!

Totally Automatic Switch-Mode Battery Charger
"Suitable for Wet-lead-acid, Sealed lead, Gel & Absorbed Mat Batteries"

	Summary:
	12 Volts, 3 Amp Constant Current (Equivalent to 6 Amp tapered charger in charging time)
	Input 115 VAC (range 90 VAC to 132 VAC)
	Suitable for U.S., Canada, other 115VAC countries & Japan (100VAC).
	Automatic Cut-off and then true Float.
	Can be left connected indefinitely without harming the battery
	Increases battery life by de-sulfating the battery
	UL and cUL (CSA) Listed
	Meets FCC Class B. High level of electro-magnetic interference filtering
	Suitable for off-board application.
	Size, only 4 ½” x 2 ¼” x 1 ¼”, and very lightweight, only 11 ounces
	...and many other advanced features described in these specifications

Explanation of the Features:
The advance technology of the Battery Sentinel Battery Chargers is fundamentally different from all other battery chargers. The conventional linear battery charger is an electrical device whereas the 20384 is a light weight sophisticated electronic device.

1. Switch-Mode Technology:
Most Battery Chargers use linear technology, which convert the 115VAC to 12 VDC at 60 Hz. This requires a large transformer, which has the disadvantage of lower efficiency resulting in higher heat generation, larger size and weight.

Battery Sentinel #20384 transforms the 115 VAC into 12 VDC at about 100,000 Hz (1667 times faster than conventional charger), which requires a much smaller transformer and this results in a unit of smaller size, low weight and improved efficiency.

The 20384 uses sophisticated electronic circuitry with microchips. All present day computers use switch-mode technology.

2. International Safety Approvals & Listing:
Both UL & cUL listed.

3. Input Requirements:
a) 90VAC to 132VAC
b) 47 - 63 Hz

Input AC tolerance +/- 20%. This means the Battery Sentinel will operate satisfactorily in areas where the input voltage is low.

This charger is also suitable for every part of the world where 115 VAC is used as well as Japan where input is 100 VAC.

4. Output:
3 Amps Constant Current @ 12 Volts DC
(Equivalent to 6 Amps tapered charger in charging time)

a) Line Regulation @ Full Load 1%
b) Load Regulation @ 4%
c) Ripple Voltage : Very low @ 1%

The peak to peak ripple voltage into a resistive load is less than 200mV for the output voltage above 12 VDC.

5.Charging Cycle :
The charging curve is attached. The explanation of the charging cycle is as following.

* CC mode = Constant current charge
* CV mode = Constant voltage charge
*** See Stage 3 description below

Stage 1 : De-Sulfation - Deep Discharge Charging Pulse Mode: LED Flash
The charger starts charging at 0.5V and gives a pulse current up to 5V. This has an effect of removing loose sulphation formed during the deep discharge state of the battery.

Stage 2 : Constant Current Mode (CC): LED Yellow
The charger changes to constant current 3A. When the battery voltage reaches up to 14.4V, the charging stage changes from CC (Constant Current) to CV (Constant Voltage) mode.

Stage 3 : Cell Equalization -Constant Voltage Mode (CV): LED Yellow
The charger holds the battery at 14.4V and the current slowly reduces. When the current reaches 50% of CC, this point is called the Switching Point at which time the charger goes into “True float” mode. The Switching Point is one of the most unique features of this battery charger. It can adjust the current automatically according to battery capacity. Other chargers are not capable of adjusting the current automatically.

Stage 4: True Float - Standby Voltage Mode: LED Green
The charger maintains the battery voltage at 13.8V as the current slowly reduces to zero. Battery Sentinel can be left connected indefinitely without harming the battery.

Recharging :LED Yellow
If the battery voltage drops down to 12.5V, charger changes from the current mode to Constant Current mode and restarts charging. The charging cycle will go through Stage 2 to Stage 4.

Battery Sentinel will charge Wet-Lead-Acid, Sealed Lead, Gel and Absorbed mat Batteries without the use of any switch.

6.Two colors and function in one LED :
LED is used to show the charging status. When the LED is Yellow, the charger is in charging or recharging mode and the current is 3 A constant. When the LED turns Green, the charger is in Standby mode and no current (zero) is flowing.

7. Protection:
a) Reverse polarity protection - provided
b) Short circuit protection - provided
c) Over-Voltage Protection - provided
d) Over current protection - provided
e) AC Surge Protection - provided
f) Soft start and stop: Starts and stops gradually. No sudden in-rush of current. This protects both the battery and all other circuits connected to the charger.

8. De-sulfation of battery: The charger will remove loose sulfation which increases battery life. (Hard sulfation cannot be reversed).

9. Electromagnetic Interference (EMI):
The charger will not generate excessive radiated or conducted emissions. No interference with TV, radio, computer or other electronic equipment. Meets FCC Class B.

Inhibit signal : The Inhibit signal is an open circuit output, leakage of less than 5 microAmp, when the charger is not connected to an AC source. This signal will be less than 50 mV DC while sinking 10 mA when the charger is connected to an AC source.

Size: 4 ½”L x 2 ¼” W x 1 ¼” H

Weight : 11 ounces

View Manual for this product (Adobe PDF Format)

• Order an Extra Lead Set