Libelium Waspmote Technical Manual page 9

Usage and storage recommendations for the batteries:
The rechargeable, ion-lithium batteries, like the ones provided by Libelium (capacity of 6600 mA·h), have certain
characteristics which must be taken into account:
Charge the batteries for 24 hours before a deployment. The aim is to have the charge of the batteries at
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100% of their capacity before a long period in which they must supply current, but it is not necessary to
improve the performance.
It is not advised to let the charge of the batteries go below 20% of capacity, since they suffer stress. Thus, it
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is not advised to wait for the battery to be at 0% to charge it.
Any battery self-discharges: connected to Waspmote or not, the battery loses charges by itself.
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Maximum capacity loss: as the charge and discharge cycles happen, the maximum charge capacity is redu-
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ced.
Batteries work better in cool environments: their performance is better at 10 ºC than at 30 ºC.
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At temperatures below 0 ºC, batteries can supply current (discharge), but the charge process cannot be
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done. In particular:
discharge range = [-20, 60] ºC
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charge range = [0, 45] ºC
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Only use the non-rechargeable batteries with the Waspmote units specifically prepared for them (identified with a
pink sticker on them). The reason is, a regular Waspmote will try to inject current in the non-rechargeable battery
if the USB or the solar panel is connected. This is dangerous for the good working of a non-rechargeable battery.
It could be damaged or even damage Waspmote.
Plug & Sense! line:
Libelium may provide the nodes with enclosures which are suitable to operate outdoors. The user, as final installer,
must take great care when handling the product. We advise to read the Plug & Sense! Technical Guide to enlarge
the life of your devices.
Remember that inappropriate use or handling of Waspmote will immediately invalidate the warranty.
For further information, please visit http://www.libelium.com/development/waspmote
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Waspmote Kit
v8.2