Your New Cells

Instructions on using your new cells:

Your brand new cells have arrived! Here are some instructions on how to get the best from them.
After refurbishment your battery was fully charged and tested. As a result there may be some remaining charge when it arrives.
To help ensure the longevity of the battery and the new cells inside, please follow these steps.

  • Do not charge the battery initially when it arrives.
  • Use the battery as normal until the stored charge dissipates –  this may not take long.
  • Once the battery is empty*, please charge it fully following the manufacturer’s guidelines.
  • Begin to use your tool as normal.
  • Your newly refurbished battery will take a couple of charge / discharge cycles to reach its maximum capacity.

(*Note: the battery is empty when, for example, a drill first stops spinning; so do not over-discharge cells by continuing to use your tool after this point.)

Battery Handling Advice


Battery Memory Effect

  • Nickel Cadmium (NI-CD) cells can suffer a memory effect if not fully discharged before recharging. To prolong the lifetime of the battery always try to discharge it fully before recharging.
  • If a NI-CD battery is charged from half-full state, it may continue to only take half a charge thereafter.
  • Nickel Metal Hydride (NI-MH) cells do not have the same issues of memory effects. They can be topped up on the charger. But they do perform best with a full discharge and recharge cycle every month or so.
  • Sealed Lead Acid cells should be charged after every use and do not suffer a memory effect.
  • Lithium Ion (Li-ion) cells do not suffer a memory effect. These can be charged at any point. Li-ion cells maintain stored charge for longer than other types, they should still be fully charged after use and before storage.


  • Batteries are particularly sensitive to temperature – excessive heat or cold can seriously damage the cells.
  • Batteries are best kept in a cool place below room temperature. They will also hold charge for longer when stored for extended periods if kept cool.
  • Try not to let you batteries freeze in a cold shed or garage over winter. This can damage the cells and they may not recover.
  • The cells and charger will get warm during charging. This is normal and most packs will have thermal sensors to regulate them.
  • Never use a hot battery straight from the charger, allow it to cool for 15 minutes first. Similarly, never charge a battery when it is warm.
  • Do not overcharge. Follow the manufacturer’s guidelines. If a battery is not taking charge, charging for extended periods will not solve this problem but may damage the cells.
  • Do not charge batteries overnight – see the precautions about the dangers of overcharging.


  • If you need to store a battery for long periods of over a month, you want to avoid letting the cells “deep discharge”.
  • Charge fully before storage. Cells lose their charge slowly while stored. If a battery is stored in a discharged state it may lose charge to the point of deep discharging, from which it may not recover.
  • Storage in a cool place will maintain the battery charge for longer, cells lose around 10% charge per month at room temperature.


  • First –  please note batteries can be dangerous!
  • The most dangerous aspect of handling batteries is the charging stage, as mains voltage and heat are involved.
  • A malfunctioning charger or battery has the risk of overcharging the cells. This can cause the cells to swell, leak, vent gas or even explode.
  • As a precaution, DO NOT charge on carpet or inflammable surfaces – a concrete floor is more suitable.
  • Monitor the battery while charging. If there is any sign of excessive heat – or smoke or fire – turn off the charger immediately!
  • If faults occur with a battery supplied by us,  do not attempt to dismantle the battery or recharge again. Contact us for advice. Our batteries have a 12-month warranty. Please leave the investigation and repair to us.
  • Another potential risk is from short circuiting the battery. Do not short out the positive and negative contacts. Do not disassemble, or use the battery in a way it was not design for – this will invalidate the warranty.
  • After servicing many thousands of batteries,  we have seen all of the above! So please be  careful and exercise common sense.