This A/C adapter accepts voltage ranges from 7.6-8.4v and is used with the SBP-8800 battery pack and the PS1200's 6CELL-BP battery pack. 

UNIVERSAL COMPATIBILITY: Works With All 7.6-8.4v Powered Bicycle Lights. Also, a replacement for SB SERIES & Night Provision PS1200 bicycle lights. Compatible With Any Standard 2.1mm 5.5mm Connectors.

FULL CHARGE INDICATOR: Red indicates battery charging and Green when the battery is fully charged

OVERCHARGE PROTECTION: After a full charge, the charger shuts off any further charging to protect the battery pack

Compatibility: 

• 7.6-8.4 Volts Li-ion Battery Packs
• Compatible With Any Standard 2.1mm 5.5mm Connectors

Battery Indicator:

• Charging: Red Light Indicator
• Full Charge: Green Light Indicator