Shadowspec Lithium-Ion Rechargeable Battery FAQ's

The Shadowspec Serenity™ and Unity™ feature Lithium-ion rechargeable batteries that require specific care.

1. How should I store my Lithium-Ion Battery?

Lithium-ion batteries (Li-ion) should not be stored over a long period of time whilst fully charged or fully discharged, the optimal storage capacity is 40%-50% and in a spot that's between 5°C and 10°C. 

Li-ion batteries will, by their own nature, self-discharge so it's worth checking and charging the batteries if they're stored more than 12 months without use. 

2. Should I remove the battery from my umbrella when not in use? 

Yes, it's best to remove your battery as a small amount of current will continue to flow from the switched-off device which will lead to complete discharge. It's also best to not store batteries outdoors. 

3. Wait, what does self-discharge mean? 

Self-discharge is an event in some batteries in which internal chemical reactions can reduce the stored charge of the battery without being plugged in. This can be up to 5% per month.

4. What is a complete discharge? 

If a Li-ion battery becomes completely squeezed-out of power until the voltage is 0 and there is no more current. This can lead to a loss of capacity within the battery and the potential for it to become completely unusable. Li-ion batteries should not be left to fully discharge.

A good rule of thumb: A Li-ion battery should be recharged when it still has about 10%-20% of power left. 

It's also good to note that most Li-ion rechargeable batteries have protection and monitoring circuits to prevent a complete discharge or overcharge. 

5. In what temperature range should I operate Li-Ion batteries? 

The ideal operating temperature is between 10°C and 55°C, however, it's best to charge the batteries at a temperature between 5°C and 45°C. 

6. What is the lifespan of the batteries?

Most Li-ion batteries can be charged up to 1000x. However, this number is generally only achieved under optimal conditions. Capacity will decrease over the life of the batteries and they're described as 'worn-out' when they drop below 70% of capacity.