This is the battery from RATStands to power their Trio Opera Light, Double Trio Opera Light and Trio Clip-on Light. 

• High capacity Li-ion batteries can power a Trio Light at full brightness for over 11 hours; if the brightness is turned down almost imperceptibly the time between charges can be increased to 24 hours.  
• Li-ion batteries are lighter and more compact than NiCad and NiMh, and do not suffer from memory effect.
• Batteries can be recharged using the single fast charger, or the charging station which charges up to 10 batteries simultaneously.
• Batteries are recharged in about half the time for which they have been used.
• Batteries incorporate a state of charge indicator.

Charging unit not supplied; choose from either a fast charger than plugs inline directly into mains, or a charging unit which can charge up to 10 batteries at one time. 

Please Note: items not held in stock, and are bought-to-order. There is at least a 2 week lead time.