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Under $20 General Purpose Battery Testers

Shop the best prices on 6,048 great value under $20 general purpose battery testers. Shopping for general purpose battery testers is easy with Fruugo, with SALE discounts, offers and savings on Elsavct, Till, Amyi and more. Buy general purpose battery testers online safely with Fruugo, with secure payment and fast shipping to Singapore.

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1 - 32 of 3,200
For M12 Converter Adapter 30A Fuse for Milwaukee 12V Lithium Battery External Power Supply DIY Connector Bracket Holder
$15.95 Save $7.00 RRP: $22.95
4X ZB2L3 18650 Battery Tester External Load Discharge Type 1.2-12V Battery 18650 Equal Capacity Tester Discharge Meter unbrand
$13.95 Save $8.00 RRP: $21.95
LCD Display Button Cell Battery Checker Battery Monitors Tester Battery Tester Checker Small Volts Checker Multicolor
$19.95
BT189 9V Battery Tester AA AAA Universal Household LCD Digital Display Button Cell Battery Tester Power Bank Detector Tool
$14.95 Save $10.00 RRP: $24.95
2pcs Battery Checker Tester Battery Capacity Tester Battery Checker Battery Tester Checker
$10.95 Save $48.05 RRP: $59.00
Universal Battery Checker for AA, AAA, C, D, N, and Button Cell Types
$21.95 Save $19.00 RRP: $40.95
Digital Battery Tester, Universal LCD Battery Tester for AAA/AA/C/D Button Cell 1.5V-9V Mini Batteries
$20.95
AC Pointer Voltmeter 0-500V Scale Range Voltage Test Meter Detector Panel Meters
$21.95 Save $14.00 RRP: $35.95
Digital Display Voltmeter Display, 3 Wire DC 0.56 Inch LED Digital External Display Module Volt Voltage Meter DC 0‑99.9V(Blue) I99SY
$19.95 Save $18.00 RRP: $37.95
1Pcs DC Voltage Meter Panel, 0.56″ Digital LED Display Waterproof High Precision Voltmeter Voltage Current Display(DC5-130V-Red) K0FW0
$18.95 Save $18.00 RRP: $36.95
2Pcs Digital Voltmeter Voltage Meter 3 Wire 0.36in Green LED Display DC0.00V‑30.0V
$19.95 Save $18.00 RRP: $37.95
Digital Display Voltmeter Display, 3 Wire DC 0.56 Inch LED Digital External Display Module Volt Voltage Meter DC 0‑99.9V(Red and Blue) TN4OA
$19.95 Save $18.00 RRP: $37.95
Digital Display Voltmeter Display, 3 Wire DC 0.56 Inch LED Digital External Display Module Volt Voltage Meter DC 0‑99.9V(Red and Blue) 018OB
$19.95 Save $18.00 RRP: $37.95
Digital Battery Tester Lcd Display Button Cell Battery Capacity Check Detector Capacitance Diagnostic Tool (1pc)
$15.95
Battery Tester Universal Household Capacity Checker for D C AA AAA N 9V Button Cell
$18.95 Save $23.00 RRP: $41.95
Automobile Battery Tester Car Hydrometer Tester Battery Hydrometer Density Testing Densitometer
$16.95 Save $52.05 RRP: $69.00
Digital Battery Tester ABS LCD Screen Button Cell Battery Checker for 1.5V 9V Metering Black
$15.95 Save $15.00 RRP: $30.95
5-55V Battery Meter, Battery Capacity Voltages Indicator, Leads-Acid & Lithiums Charge Discharge Monitors Motorcycle White
$20.95
7-55V Battery Level Indicator Digital Voltmeter 12V 24V 36V 48V 18650 Battery Capacity Test Board Professional White
$19.95
2025 Button Cell Battery Checker Digital Lcd Display Remaining Electricity Tester Checker Digital Meter Tool
$9.95 Save $9.00 RRP: $18.95
2025 Battery Tester with Meter Electric Voltage Tester for AA AAA C D N Button Cell Batteries Battery Tester Checker
$17.95 Save $18.00 RRP: $35.95
2025 Aquarium Co2 Monitor Notes Glass Drop Concentration Checker For Tester 1#
$4.95 Save $5.00 RRP: $9.95
2025 Compact Household Battery Checker, Universal Battery Tester for Quick Testing of AA, AAA, C, D, 9V, 2.5V Button Cell and All Household Batteries
$15.95 Save $16.00 RRP: $31.95
2025 Compact Household Battery Checker, Universal Battery Tester for Quick Testing of AA, AAA, C, D, 9V, 2.5V Button Cell and All Household Batteries
$15.95 Save $15.00 RRP: $30.95
Digital Battery Tester LCD Display Accurate Detection Portable Battery Checker for C AA AAA
$6.95 Save $21.00 RRP: $27.95
KWS-DC28 Digital Voltage & Current Meter, Dual Display 4-30V 0-12A Tester for Electricians, Chargers & Power Bank Testing
$19.95 Save $25.00 RRP: $44.95
Battery Voltage Internal Resistance Tester Highprecision Phosphate BatteryTester
$21.95 Save $19.00 RRP: $40.95
USB Tester Professional Current Voltage Power Time Accurate Measurement Bidirectional USB C Meter 430V 06.5A
$20.95 Save $13.00 RRP: $33.95
LCD Display USB Tester Multifunctional Current Voltage Battery Capacity Meter Monitor Black
$17.95 Save $11.00 RRP: $28.95
YB26VA Dual Display USB Detector Voltmeter Ammeter Voltage Current Meter Battery Capacity TesterBicolor
$19.95 Save $11.00 RRP: $30.95
12-84V GY-6G Battery Power LCD Display Voltage Meter Voltmeter with Light Alarm (Green Light)
$14.95 Save $8.00 RRP: $22.95
2Pcs USB Load Tester Adjustable Resistor Electronic Test Module 1A 2A 3A Discharge Accessory
$14.95 Save $8.00 RRP: $22.95