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Universal Laptop Battery Tester - RFNT3

Universal Laptop Battery Tester - RFNT3
Quantity available: 4
Universal Laptop Battery Tester

Test all types of Laptop Battery, includes charge function and testing software.

Includes charger, manuals on CD, 12 different types of connectors and cables.

external laptop battery tester charger discharger
1. test
2. charge
3. discharge
external laptop battery tester charger discharger


RFNT3 is a multi-function battery testing device, having the features below:
with one channel, supporting one intelligent battery
Supporting charge, discharge, test, capacity correction, charge / discharge 50% capacity
LCD for displaying battery information
LED for indicating working status
With charge-key, discharge-key, backlight-key and function-key
Pre-charge, fast charge and constant voltage charge for charging stages and the variation range of the values of the constant current and the constant voltage is less than 1%
Constant current for discharging
With a USB port for connecting with computers, master machine can monitoring and control slave machine
Basic Parameters

Adapter Input: AC 100 ~ 240 V Output: DC 24V 2.65A
Discharging mode
Constant current discharge for double loads, inner load & external load
Charging mode
Constant current and constant voltages are the main mode. Active charge and pre-charge are available according to different battery voltage.
Active charge:
Tester may not recognize 0V-battery. Users should press the charge key to start up the active charge function. Being activated and going to normal charging status, when the battery establishes communication with the tester.
Constant current:
Tester goes into fast charge status when voltage of single cell > 3000mA & < 4200mA. Fast charge current relates to the battery nominal capacity.
At the end of charge:
The current intensity begins to decrease when tester goes into constant voltage charge status. It stops charging when the capacity reaches 100% and the current intensity less than 1A or the current intensity reduce to the end charge current.
Charging current
There is a connection between current intensity and charge mode. The details as below:
Nominal capacity Pre-charge current Fast charge current End charge current
≥6000 400mA 2500mA 300mA
≥3500 400mA 2000mA 200mA
Else 200mA 1000mA 100mA

Function Introduction
Active, pre-charge, constant current and constant voltage are the stages of charging mode. The initial charging mode depends on the battery voltage, so active and pre-charge don't happen to every batteries. For charging mode and current, please refer to the paragraphs of charging mode and charging current on page 2 & 3.
Tester will stop charging if one of the conditions below was met.
1) Remaining capacity ≥ 99% & current intensity = 0
2) Remaining capacity = full charge capacity
3) Current intensity reduce to end charge current when constant voltage charge
4) Remaining capacity reach up the set value
Constant current discharge for double loads
Inner load: 0 ~ 1000mA, adjustable continuously via Battery Manager
External load: 0mA, 500mA, 1000mA, 1500mA, 2000mA, five gears with dip switches offered
Tester will stop discharging if one of the conditions below is met.
1) Remaining capacity ≤ set value
2) Voltage ≤ set value
3) Current intensity reduce to zero
Many batteries can not measure exact current intensity, which cause an else current value appears after you set a value. However, the actual discharging current is the same with your set value.
Testing time is 12 seconds and the purpose is to check both the charging and discharging performances. After finishing test, LED flickers with green color and LCD reports the test result.
Normal: Test OK Shown on LCD
Abnormal: Test NG Shown on LCD
Possible causes and solutions for the abnormal:
1) Cause: battery voltage is too low to discharge
Solution: try to charge the battery to raise voltage
2) Cause: remaining capacity is too full to charge any more
Solution: try to discharge the battery to reduce the remaining capacity
3) Bad contact of battery connecting wires
4) Damaged battery
5) Tester trouble
Capacity Correction
The battery capacity value in the battery management chip will different from the actual capacity after a battery goes through many recycling cycles. It will affect the use of the battery when the difference reaches a certain degree. Capacity correction is to deep discharge a battery and then fully charge, which will correct the capacity value in the battery management chip.
Discharging current can be set via Battery Manager. Deep discharge will cause a battery losing communication with tester, so battery dropping phenomenon may happen in the discharging process if the end capacity and voltage are set too low. In such a case, active charge will make the battery work again.
50% Capacity
CD50%: charge firstly, and then discharge to 50% capacity
DC50%: discharge firstly, and then charge to 50% capacity
Online Functions
Tester can be connected with master machine via a USB port. Users can monitor, control and set parameters via Battery Manager software in the master machine.

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