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# Range extender and Elios 1 battery storage
## Discharging Range Extender / Elios 1 Batteries
Proper battery care is essential to maximize the lifespan and performance of LiPo (Lithium Polymer) batteries. One of the most important aspects of battery maintenance is storing batteries at the correct voltage.
Storing a LiPo battery fully charged or discharged for extended periods (more than 2–3 days) accelerates battery degradation and reduces its overall lifespan. For Elios 1 Range Extender batteries, the recommended storage voltage is **3.8 V to 3.9 V per cell**, equivalent to **11.4 V to 11.7 V** for a 3-cell (3S) battery.
### Available Discharge Methods
#### Using the Range Extender
The battery begins to discharge as soon as it is connected to the Range Extender. However, the power consumption is very low, meaning that discharging the battery to storage voltage may take several hours. For this reason, this method isn't practical for routine battery management.
#### Using the Dual Battery Charger/Discharger (Discontinued)
If you have access to the Flyability Dual Battery Charger/Discharger, use the **STORAGE** program to automatically discharge the battery to the appropriate storage voltage.
For detailed instructions, refer to **page 13 of the user manual**.
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***
### Recommended Alternative Solution
We recommend using a dedicated LiPo battery charger with a built-in storage function. These chargers are widely available from drone, RC model, and hobby retailers.
The main advantage of a charger/discharger is that it includes a dedicated **Storage Mode**, which automatically charges or discharges the battery to the recommended storage voltage.
Dedicated LiPo dischargers are also available; however, they are generally less pratical and often cost nearly as much as a charger. For this reason, we recommend purchasing a charger with a built-in storage function.
#### Recommended charger:
* SkyRC S65
* SkyRC D100
* SkyRC T100
* SkyRC S100neo
* ISDT D2
* ISDT K1
#### Recommended Settings
Configure the charger with the following settings:
* Battery Type: **LiPo**
* Mode: **Storage**
* Cell: **3s (11.1v)**
* Current: **3A**
If you are using a discharger, use the following settings:
* Battery Type: **LiPo**
* Cell: **3s (11.1v)**
* Current: **3A**
* End voltage: **11.5V**
***
#### Required Adapter
To connect the Range Extender battery to the charger, the following adapter is required:
* **XT60 Female to MPX Male**
***
### General Safety Guidelines
* Never discharge a battery below the recommended voltage.
* Over-discharging may permanently damage the battery and may create a fire hazard.
* Never discharge a battery at a higher current than recommended
* Never leave a charger unattended while it is connected to a battery.
* If any abnormal behavior is observed (excessive heat, swelling, unusual odor, or leakage), stop the process immediately and disconnect the battery if it is safe to do so.
* Place the battery and charger/discharger on a non-flammable surface and keep them away from combustible materials. Ideally place inside a metallic box or LiPo Safety bag.
* Never charge or discharge swollen, leaking, damaged, or physically compromised batteries.
* Disconnect the battery from the charger/discharger once the storage process has been completed.
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