All additional devices in all generations are charged with Spider or Li+ charger

In the 8th generation that uses 8th generation headbands, all equipment is charged by Spiders or LI+ chargers

In 9th and 10^th generation that uses RGB headbands and vests

• Headbands and vests are charged with FireFly or LI+ chargers
• Guns are charged with Spider chargers or LI+ chargers or  Smart Li+ chargers

In Alpha tag generation

• Headbands are charged with a FireFly or Li+ charger
• Guns are also charged with Firefly or Li+ charger

Here is a table

Chargers	Devices	9-10 generation headbands/vests	9-10 generation guns	Alpha Tag headbands/vests	Alpha Tag guns
FireFly	-	+	-	+	+
Spider	+	-	+	-	-
Smart Li+ charger	+	-	+	-	-
Li + Charger	+	+	+	+	+