The Unitron Charger Combi BTE 2 is a charging accessory designed for rechargeable Unitron hearing aids, specifically compatible with Stride B-PR (9/7/5/3/1) and DX Stride PR (9/7/5/3) models. This user guide provides comprehensive information on its function, operation, maintenance, and safety.
Function Description
The primary function of the Unitron Charger Combi BTE 2 is to charge the integrated rechargeable batteries of compatible hearing aids. It serves as a convenient and safe docking station, automatically switching off the hearing aids upon insertion into the charging slots. The charging process stops automatically once the batteries are fully charged, allowing the hearing aids to be safely left in the charger.
An optional Power Pack accessory extends the charger's functionality by providing a portable power source, enabling charging of hearing aids when an external power supply is unavailable. The Power Pack also contains a built-in, non-removable rechargeable lithium-polymer battery.
Important Technical Specifications
- Power Supply Output Voltage: 5 VDC +/-5%, current 500 mA - 1 A
- Power Supply Input Voltage: 100-240 VAC, 50/60Hz, current 0.25 A
- Charger Input Voltage: 5 VDC +/-5%, current 300 mA
- USB Cable Specifications: 5 V min. 1 A, USB-A to micro-USB, maximum length 1 m
- Operating Temperature Range (Charger & Hearing Aids): +5° to +40° Celsius (41° to 104° Fahrenheit)
- Power Pack Operating Temperature Range: +5° to +40° Celsius (41° to 104° Fahrenheit)
- Storage and Transportation Temperature Range: -20° to +60° Celsius (-4° to 140° Fahrenheit)
- Humidity (Operation): 0% to 85% (non-condensing)
- Humidity (Transport): 0% to 90% (non-condensing)
- Humidity (Storage): 0% to 70% (non-condensing)
- Atmospheric Pressure (Operation, Transport, Storage): 800 hPa to 1060 hPa (500 hPa to 1060 hPa for transport/storage)
- IP Rating: IP22 (protected against solid foreign objects of 12.5 mm diameter and greater, and vertically falling water drops when enclosure tilted up to 15°, with the lid closed).
- Battery Type (Hearing Aids & Power Pack): Lithium-ion batteries with a Watt hour rating <20 Wh.
Usage Features
- Easy Connection: The charger connects to a power supply via a micro-USB port and a standard USB cable.
- Automatic On/Off: Hearing aids automatically switch off when inserted into the charging slots and switch on when removed from the charger.
- Charging Indicators: Indicator lights on the hearing aids show the charging state of the battery. A solid green light indicates a full charge.
- Charging Times:
- 0-10% charged: Indicator light is red.
- 11-80% charged: Indicator light is orange.
- Approx. 30 min for 30% charge
- Approx. 60 min for 50% charge
- Approx. 90 min for 80% charge
- 81-99% charged: Indicator light is green and blinking.
- 100% charged: Indicator light is solid green (approx. 3 hours for a full charge).
- Low Battery Warning: Hearing aids emit two beeps when the battery is low, providing approximately 60 minutes of usage before requiring a charge (may vary based on hearing aid settings).
- Power Pack Integration: The optional Power Pack attaches to the bottom of the charger, allowing simultaneous charging of both the Power Pack and hearing aids. The Power Pack has its own indicator lights to show its battery status (0-29% (1 dot), 30-59% (2 dots), 60-100% (3 dots)).
- Portability: The Power Pack allows for charging on the go, making the system suitable for travel. Rechargeable hearing aids and the Power Pack can be taken onto airplanes as carry-on luggage.
Maintenance Features
- Daily Care: Ensure charging slots are clean. Do not use household detergents, soap, or other cleaning agents.
- Weekly Care: Remove dust or dirt from the charging slots.
- Dry and Clean: Always ensure that both the hearing aids and the charger are dry and clean before charging.
- Disconnection for Cleaning: Always disconnect the charger from the power mains before cleaning.
- Protection from Shocks: The charging accessories and power supply must be protected against shocks. If damaged after a shock, they should not be used.
- Temperature Control: Avoid exposing charging accessories to excessive heat or direct sunlight. Do not use microwaves or other heating devices for drying.
- Power Pack Storage: For long-term storage (a year or longer), to prevent damage to the battery cell, the maximum temperature range should be -20° to 25° Celsius, and the battery cell should be discharged and recharged a minimum of once every three months.
- Expected Service Life: The charger has an expected service life of five years. Sonova AG provides a minimum five-year service period after the charger's phase-out.
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