Battery Charger is a Normal Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Battery Charger is Unlimited.
YGOPRODeck lists Battery Charger for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Battery Charger belongs to the Batteryman archetype—use that tag when searching for engine pieces and tech options.
A listed print of Battery Charger appears in Dark Revelation Volume 3 (DR3-EN221) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Battery Charger is about $0.15 on Cardmarket (prices change frequently).
