BLOG & GUIDES

Battery Blog & Guides

Honest answers from a battery factory: comparisons, how-tos, safety and buying guides.

Guide

How Long Do AA, AAA and D Batteries Last?

Shelf life vs. running time: the two numbers every retailer should understand.

How Many Volts Is a AA Battery?

1.5V, 3V, 9V, 12V — a no-confusion voltage table for every common cell.

How to Dispose of Batteries Safely

Alkaline, lithium and coin cells each need different handling — do not put them in regular trash.

How to Choose the Right Battery for Your Device

Capacity, drain and size — the three dimensions that decide which battery is correct.

What Does AQL Mean in Battery Quality Control?

AQL sampling explained — the acceptance rule behind every bulk battery shipment.

Understanding UN38.3 — the Lithium Battery Transport Test

Why every lithium shipment needs UN38.3 and what the certificate covers.

Battery Shelf Life: The Storage Guide

How long batteries last in storage and how to keep them from losing charge.

Button Cell Battery Safety Guide

Why button cells are a swallowing hazard and how compliant packaging prevents it.

How Long Do Hearing Aid Batteries Last? (A10/A13/A312/A675)

Service life by size number, shelf life in the sealed pack, and how zinc-air cells activate.

Battery Supplier vs Battery Manufacturer: Working With a China Factory

What changes when you buy factory-direct from a battery manufacturer wholesale line instead of a trading supplier.

Comparison

AA vs AAA Battery: Complete Size, Voltage & Usage Comparison

Same 1.5V, very different capacity and devices. Here is how to choose between AA and AAA without guessing.

Alkaline vs Zinc Carbon vs Lithium Batteries

Three chemistries, three price bands — which suits your product line?

CR2032 vs CR2025 vs CR2016: Which Coin Cell?

Same 20 mm diameter, three thicknesses — here is how to pick and why they are not always swappable.

A10 Battery Equivalent: Which Zinc-Air Cells Match Size 10?

PR41, PR70, 10A, P10 — a no-guess equivalent table for hearing aid size-10 cells.

Button Cell Battery Cross-Reference Guide (AG/LR/SR/CR)

The full cross-reference table: AG to LR to SR to IEC codes — and when equivalents are NOT interchangeable.

How-to

How to Replace a Watch Battery (All Brands)

The complete 5-minute process, plus the cross-reference table for 377, 371, 364 and SR626.

How to Replace a Car Key Fob Battery by Brand

The universal steps plus a brand table: Nissan, Honda, Toyota, Mazda, Ford and more.

How to Test a Battery with a Multimeter

Measure voltage, judge capacity and avoid the classic false readings.

How Battery OEM Works — from Specification to Shelf

The four steps of a private label battery program, explained by the factory.

Hearing Aid Battery Tester: How to Test a Zinc-Air Cell

Why a multimeter can mislead you on zinc-air cells, and the two checks that actually work.

Travel

Can You Bring Batteries on a Plane? (TSA Rules)

What can travel in your pocket, what must be in checked baggage, and what is prohibited.

Ready to Put Your Brand on a Great Battery?

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