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Compact rectangular battery tester with magnetic slot and LCD screen

DLYFULL DB1 Magnetic Battery Tester 1.2V 1.5V 3.0V 3.7V 9.0V

SKU CH-TG3P-SMFXA

Tests AA, AAA, C, D, 9V, button cells, 18650 and more with a magnetic slot and LCD readout; USB-C recharge lasts 15 hours

  • Team affiliation1 Piece
  • Key features1*DB1 Battery Tester; 1*USB-C Charging Cable; 1*User Manual,
  • Overall height3.7 L x 2.5 W x 1.1 H inches
  • Overall width3.7 L x 2.5 W x 1.1 H inches
  • Overall length3.7 L x 2.5 W x 1.1 H inches
  • Product weight0.2 lb (0.09 kg)
  • Test AA to 18650 cells with one device
  • LCD shows good weak or poor voltage instantly
  • Magnetic slider holds battery firm for one-hand use
  • USB-C recharge gives up to 15 hours runtime
  • Pocket size at 3.7 by 2.5 by 1.1 inches

Universal Battery Tester

The DLYFULL DB1 checks voltage and health for 1.2V Ni-MH, 1.5V alkaline, 3.0V lithium, 3.7V Li-ion and 9.0V cells. It accepts AAA, AA, C, D, SC, N, button types including CR2032 and LR44, plus cylindrical cells such as 18650 and CR123A. Home users and technicians get a single handheld tool for the most common household and portable batteries.

Magnetic Slot and One-Touch Operation

Place a cell in the tray and slide the magnetic holder to lock it firmly without slipping, allowing one-hand testing. A short press on the V-SELECT button powers the unit and cycles through the supported chemistries; a quick double press toggles the buzzer; a long press shuts it off. The LCD reads good, weak or poor directly. No calibration or adapters are required, though very flat button cells may need careful alignment to make contact.

Rechargeable Power and Limits

The built-in battery recharges via USB-C and runs for up to 15 hours on a full charge, so frequent cell swaps are unnecessary. The tester reports voltage status only; it does not measure capacity, internal resistance or load performance. It cannot assess high-current packs, automotive starter batteries or proprietary packs beyond the listed voltage ranges and physical sizes.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $46.99
Pricier than about 71% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameDLYFULL
Product typeVolts
Size & build
Overall height3.7 L x 2.5 W x 1.1 H inches
Overall width3.7 L x 2.5 W x 1.1 H inches
Overall length3.7 L x 2.5 W x 1.1 H inches
Product weight0.2 lb (0.09 kg)
More details
Team affiliation1 Piece

Questions about this item

How do I know the DB1 is reading correctly after I turn it on?

The LCD shows the battery voltage and labels it good, weak or poor so you can confirm the result immediately.

What comes in the box and what must I supply myself?

The package includes the DB1 tester, a USB-C charging cable and a user manual; no USB power adapter is included.

Which battery types and sizes does this model cover?

It tests 1.2 V Ni-MH/CD, 1.5 V alkaline, 3.0 V lithium, 3.7 V Li-ion and 9.0 V cells, including AAA, AA, C, SC, D, N, button cells, CR123A, CR2032, LR44 and 18650.

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