16.8V lithium battery cannot be used with 12V headlights.
16.8V lithium battery cannot be used with a 12 V headlight. It is possible to connect three 6 V bulbs in series to connect 36 V.
Lithium batteries are a type of battery that uses lithium metal or a lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution. Lithium batteries can be roughly divided into two categories, lithium metal batteries and lithium ion batteries.