How a car battery works
What a lead-acid battery is made of, why it has six cells, and how standard, AGM and EFB batteries differ.
the car battery without mysteries: a driver's reference
Akb Video — the car battery without mysteries
Most people only think about their battery when the starter suddenly cranks slowly or not at all. This reference helps you understand it in advance: what happens inside the battery, which signs point to a discharge, how to measure the voltage with an ordinary multimeter, how to charge the battery safely at home and what to do with one that has reached the end of its life. We write calmly, without scare stories and without advertising.
A battery rarely fails out of nowhere: more often it sends warning signs for a long time that nobody notices. A couple of minutes with a multimeter once a season usually tells you more about its condition than any guesswork.
Where to start
Testing and charging
A practical article on charging at home: the right spot, connecting as the manual says, monitoring and checking the result.
Winter and cold weather
A collection on getting the battery ready for freezing weather and why spare charge matters most in the cold.
Safety and recycling
Answers about electrolyte, hydrogen released during charging and where to take a spent battery.
Reference sections
- Sections
Four sections: battery design and types, testing and charging, seasons and storage, safety.
- Guides
How to charge a car battery at home: preparation, steps, mistakes and a checklist. The article catalogue is here too.
- Questions
Short answers on signs of a flat battery, charging at home, storage, replacement and recycling.
- Collections
Reading paths: getting ready for winter, a car left parked for weeks, choosing a new battery by its specs.
- Reference
A driver's glossary: cell, electrolyte, polarity, capacity, cold cranking amps, self-discharge and more.
- New
A feed of the newest reference pages with dates, topics and a note on who will find them useful.
- Archive
Every published page of the reference, arranged by preparation date and topic.
Check your battery in five steps
Inspect the case and terminals
In good light, look the battery over: check for cracks, bulging, leaks or damp patches around it. If the case is damaged, stop there and have the battery looked at by a specialist.
Make sure the terminals are clean and tight
White or greenish deposits and loose cable clamps get in the way of the current and can cause starting problems on their own. If a clamp is loose, tighten it as described in your vehicle's manual.
Measure the resting voltage
The reading only makes sense once the car has stood for several hours with the ignition and all electrical loads switched off. Set the multimeter to DC voltage and touch the probes to the battery terminals, observing polarity.
Compare the reading with the benchmark
A fully charged, healthy battery at rest usually reads about 12.6–12.7 V. If the figure is noticeably lower, the battery is undercharged or losing condition; if it is much lower, it needs charging and a check.
Write down the result and decide what's next
Note the date, the reading and the weather. A slight undercharge can be topped up by charging as your charger's manual says; if the voltage soon drops again or the battery can't hold a start, it is better to see a specialist.
The essentials in brief
Are you a shop or a garage?
No. Akb Video is a reference site with articles and explanations. We sell nothing, take no orders, and do not repair or service batteries; there are no request forms on this site.
Can you recommend a particular battery brand?
No, we do not name brands or models. Choose a battery by the specs given in your vehicle's manual: capacity, cold cranking amps, polarity, size and type of mounting.
Can I charge a car battery at home?
Yes, as long as you do it in a well-ventilated place, away from flames and sparks, and strictly following your charger's manual. We walk through the full procedure in our practical guide.
What should I do with my old battery?
Spent lead batteries with electrolyte are hazardous waste; in Russia they are classed as hazard class II. They must not go in household waste: take the battery to a collection point. Other countries have their own rules and take-back systems.
About the project
There used to be no real website on this domain, only unrelated spam pages. Our reference has nothing to do with them, and all the old addresses have been closed.
"AKB" in the domain name is the common Russian abbreviation for a storage battery, the subject of this whole reference. Despite the word in the name, we are not a video channel: there is only text here.
We put together clear explanations for everyday drivers, drawing on owner's manuals and training materials on automotive electrical systems. Complex work, repairs and opening up a battery are left to specialists.
Sources
- Vehicle owner's manuals
- Battery charger manuals
- Russian Federal Waste Classification Catalogue (FKKO)
- Training materials on automotive electrical systems
Information is current as of the date the page was prepared. Batteries differ in design and maintenance requirements, so the final word always belongs to the manual for your vehicle, for the battery itself and for your charger.