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Battery tear-down and refurbishment

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Refurbishing a laptop battery can be a complex process that involves disassembly, inspection, and replacement of worn-out components. It’s essential to proceed with caution and prioritize safety throughout the tear-down and refurbishment process. Here’s a general guide to help you refurbish a laptop battery:

Suit Up and Space Out:

  • Even though it’s not overly complex, battery reconditioning involves some science. Make sure you’re working in a well-ventilated area.
  • Protective wear such as safety goggles, chemical-resistant gloves, and an apron is recommended.

Create a Cleaning Solution:

  • Mix baking soda and water in a 2:1 ratio to create a runny paste. This mixture can be used to clean batteries and cover up acid spills.

Clean the Battery:

  • If the battery terminals are corroded, scrub off the buildup using a toothbrush after applying the cleaning paste (or a solution specifically designed for cleaning batteries) to the posts.
  • The solution is working if there’s a foaming reaction. For batteries with significant corrosion, use steel wool.
  • Completely clean, wipe down, and dry the terminals.

Connect the Voltmeter:

Empty the Battery Cells:

  • Remove the battery caps to access the cells.

Clean the Battery Cells:

  • Clean each cell of any extra lead sulfate crystals. These accumulate over time and reduce the battery’s capacity.
  • Use a toothbrush or other suitable tools to remove any deposits.

Replenish the Electrolyte:

  • Mix 1 pound of Epsom salt with 1 gallon of distilled water (avoid tap water due to added chemicals).
  • Use a funnel to pour the mixture into each cell until they are 100% full.
  • Put the caps back on the battery and shake it for a couple of minutes.

FAQ's

After the battery SOH has dropped below 75-80% capacity, it can be refurbished (remanufactured), recycled into a new battery, or given a second life as secondary power storage in other applications. However, it is also possible that a battery can be repaired by replacing weak or defective cells or components.
 

This can be done by connecting a resistive load to the battery terminals or using a specialized discharge device. Once the battery is discharged, allow it to rest for a period of time, typically a few hours to a day. This rest period helps balance the cell voltages and prepares the battery for the next steps.

Battery Pack Rebuilds

There’s no need to let your trusty old cordless tool go when it no longer holds a charge, and a replacement battery is too costly or hard to find. Let a trained professional at an Interstate All Battery Center rebuild your NiCd or NiMH battery pack to keep your tools powered up.

Rebuilt batteries are engineered using working cells from old batteries, providing reliable performance. Understandably, however, these batteries don’t offer the same level of performance or warranty protection as brand-new batteries.
 
The cooling system is responsible for keeping the battery cool; if it isn’t working properly, the battery can overheat and be damaged. Battery Reconditioning: Battery repair centers can also recondition your EV battery. This involves using specialized equipment to restore the battery’s performance and capacity.
 

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