Charging Batteries

This charger is for use with Shure SB903 Li-ion rechargeable batteries and can be powered from either an AC power source or a USB port. The charger LED indicates battery status during charging.

  1. Using the included USB-C cable, connect the charger to the AC adapter plugged into an AC power source, or to a powered USB port.
  2. Insert a battery into the charging bay.
  3. Monitor the charging status LED until charging is complete.

Charging Status LED

Description Color State
Ready for Use Green (solid) Device is fully charged
Charging Red (flashing) Charging
Error Yellow (quick flashing) Battery or power supply error
Not charging Off Power supply is disconnected, or no device is docked in the charging bay



Battery Charger

DC Input Voltage Range

5 V DC

Charge Current


220 mA

Charge Time

50% = 3 hours; 100% = 5 hours : 30 minutes

Charge Voltage

4.2 V

Operating Temperature Range

10 °C to 45 °C (50 °F to 113 °F)


20.5 x 37.5 x 79.5  mm (0.81 x 1.48 x 3.13 in.), H x W x D


39 g


Molded Polycarbonate

Power Supply

Input Voltage Range

100 to 240 V AC

Operating Frequency

50 Hz to 60 Hz

Maximum Input Power


at 100 V AC full load

Output Voltage

4.75 to 5.25 V DC

Maximum Output Power

1.0 A

at 5 V

Operating Temperature Range

0  °C to 60 °C (32 °F to 140 °F)


  • Battery packs may explode or release toxic materials. Risk of fire or burns. Do not open, crush, modify, disassemble, heat above 140°F (60°C), or incinerate.
  • Follow instructions from manufacturer
  • Only use Shure charger to recharge Shure rechargeable batteries
  • WARNING: Danger of explosion if battery incorrectly replaced. Replace only with same or equivalent type.
  • Never put batteries in mouth. If swallowed, contact your physician or local poison control center
  • Do not short circuit; may cause burns or catch fire
  • Do not charge or use battery packs other than Shure rechargeable batteries
  • Dispose of battery packs properly. Check with local vendor for proper disposal of used battery packs.
  • Batteries (battery pack or batteries installed) shall not be exposed to excessive heat such as sunshine, fire or the like
  • Do not immerse the battery in liquid such as water, beverages, or other fluids.
  • Do not attach or insert battery with polarity reversed.
  • Keep away from small children.
  • Do not use abnormal batteries.
  • Pack the battery securely for transport.


This device complies with Part 15 of the FCC Rules.

Operation of this device is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Changes or modifications not expressly approved by Shure Incorporated could void your authority to operate this equipment.

Please consider the environment, electric products and packaging are part of regional recycling schemes and do not belong to regular household waste.

CAN ICES-3 (B)/NMB-3 (B)


This product meets the Essential Requirements of all relevant European directives and is eligible for CE marking.

The CE Declaration of Conformity can be obtained from:

Authorized European representative:

Shure Europe GmbH

Headquarters Europe, Middle East & Africa

Department: EMEA Approval

Jakob-Dieffenbacher-Str. 12

75031 Eppingen, Germany

Phone: +49-7262-92 49 0

Fax: +49-7262-92 49 11 4