From now on, Windsond sondes use a mini connector for the battery, and the battery itself is fastened by velcro. To charge the battery, remove it from the sonde and connect it to the USB charger. Previously, the battery was soldered in the sonde and the USB charger connector needed to extend down into the sonde encasing.
This change removes the concern whether a particular sonde is charged and even enables the same sonde to be launched multiple times in succession by changing to a fresh battery. The battery can be removed for repairs, or replaced in case it’s damaged from deep discharge. For different trade-off between weight and running time, other battery sizes can be employed.
Another issue was the strict shipping regulations for LiPo batteries that affect world-wide shipping since Jan 1, 2013 to handle the risk of spontaneous battery combustion that have occurred aboard aircrafts. The rules are complex and cause headaches for many businesses. Even though the Windsond battery is miniscule and hardly constitutes a risk for anything, limitations may that apply — depending on whether you turn to the Swedish Postal Service, DHL, UPS or Fedex. Separating the battery gives the option to dropship the batteries directly from China which bypasses the problem altogether since China has less strict shipping regulations than Europe.
The battery assemby is custom-made for Windsond and I’m happy about how this change makes the system more modular and easier to handle.