Hot and cold charging
Advanced charge techniques guarantee full state-of-charge and safe operation even under adverse conditions.
Below 0C (32F), the Duro applies a trickle charge to warm up the nickel-based battery, and then switches to fast-charge on reaching operating temperature. A charge time-out timer prevents a prolonged charge at low temperature. For safety reasons, lithium-ion does not charge below 5C (41F).
Above 50C (123F), the Duro allows the battery to cool down to 45C (113F) before taking on a charge or resuming from a previous charge. Should the temperature remain high, a time-out timer terminates the battery with a fail indication. Preventing charge at high temperatures protects battery and equipment and achieves optimal safety.
Full-charge termination
The termination methods of nickel-based batteries are based on negative delta V, plateau timer and dT/dt. Lithium-ion terminates on a current saturation. Redundant detection methods provide safe charging, even if the battery is known to be defective.
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Tri-chemistry selection The Duro charger offers specialty adapters that detect the battery chemistry and select the correct charge algorithm. Nickel and lithium-based batteries can be charged in the same adapter*. * Only for batteries with usable identification code |
Active charge operation
Operators often want to monitor voice traffic while the radio is in the charger. The Duro makes this possible by replenishing the spent energy with a topping charge. With the Duro charger, a two-way radio can become a quasi base station.
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Signal indicators Two light signals indicate charging, ready and fail status. Fail denotes a battery that is shorted, unable to follow the predicted voltage pattern or other anomalies. A fail condition terminates service to protect the battery and charger, and alerts the user with a flashing red LED. |
Reactivating lithium-ion batteries
When discharged too low, some lithium-ion batteries appear dead and cannot be recharged. The Duro charger reactivates the pack’s safety circuit and applies a fast-charge when reaching normal voltage.
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Conditioning / calibration discharge |
Battery Charger Product Page
Find out more about how Cadex Battery Chargers can help in these applications:
