All Greenworks batteries produced today are Lithium Ion batteries. They are basically the same as used in laptop computers, tablets, electric cars and more.
The battery delivers high power from full to empty. A huge benefit compared to i.e. conventional car batteries is that they only drain out a very small amount during storage, a fully charged battery can be stored over a long period of time without losing all its power. However, if you store a battery with less then 50% charge you need to consider to charge it during a long period of charging.
The battery makes internal checking of cells and circuits from time to time, if the battery is left with very low charge level for longtime storage, the self-diagnosis may drain the battery to a “low safety limit”, were the Battery Management System (BMS) puts the battery in “recovery mode” to keep it safe (See below description how to get the battery out from “recovery mode”).
For general storage always store the battery indoors in a non- humid environment. Store the battery between +5C to +35C. Avoid direct sunlight, chemicals, heat radiation and other hostile environments.
The battery does not need to be recharged during longtime storage as described above.
A battery that is “normally” used can last for more than 1000 cycles. A cycle is when the battery goes from fully charged to empty and back to fully charged again. A battery is to consider as a consumable product, and will eventually lose its ability to store the same amount of energy as when it was new.
A new battery is charged more than 30% when delivered.
There is a “run in period” for a new battery, it will reach its full capacity after 3-5 cycles.
Warm and cold temperatures affect the battery. The normal usage span is -20C to +45C. The battery can be used below and above these limits but the BMS may shut the battery down to avoid it from being damaged. The usage time will be shorter in cold conditions.
If the BMS shuts off the battery store the battery in above mentioned temperature span for approx. 30 minutes to allow it to return to working temperature.
The battery can be recharged no matter the power it holds for the moment. To charge it when at i.e. 40% or 75% does not affect the battery negatively.
The charger will sense the status of the battery and charge it accordingly.
Please see the charger’s manual for details about status indicators, as they may vary.
Allow a battery that is warm from usage to cool down before recharging. Some chargers have internal fans to cool the battery when charging, but the battery may still need to cool on its own first.
The battery will be warm when charging.
Be sure to press the battery all the way in to the charger until “click”.
Charge the battery between temperature +5C and +45C (keep out of direct sunlight).
If the battery is completely drained and does not take “normal” charge it might be in recovery mode. In that case place the battery in the charger for 20h. The charger will “recover” the battery and after this the battery will work and charge as normal. This does not affect the lifetime of the battery. Note that some older models of batteries might not be able to recover after complete drainage.
When in use the battery will get warm. The more power that is required the warmer the battery will get. This is normal. The BMS will shut the battery if it gets too warm to protect it.
Allow the battery to cool down before recharging.
If the battery does not charge under normal circumstances please make sure that:
- you have consulted the owners manual
- The charger works.
- The battery is fully inserted in the charger (click sound).
- The ambient temperature is between stated values.
If above does not solve the issue, then allow the battery to go through the recovery recharge mentioned above. If this does not help is would the battery need to be replaced and recycled.
Greenworks participates in recycling processes in each region where we have sales. Greenworks contributes to public recycling stations via an annual fee. The batteries contain valuable material that will be recycled in the battery recycling process.
Greenworks does not recommend trying to repair damaged batteries.
Go green, use Grenworks products and recycle.