BigFun! High-Lighter 510 Concealer Battery – 650mAh The BigFun! High-Lighter 510 Concealer Battery delivers reliable performance in a playful, highlighter-inspired design for added discretion. Cleverly styled to resemble a classic marker, this compact device combines novelty aesthetics with dependable functionality. Equipped with a 650mAh battery, variable voltage control, and auto-draw activation, it offers consistent power in a sleek, undercover form factor compatible with most 510-thread cartridges.