Swelly™ Fun Extender (Backup Battery)

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The party doesn’t have to end! Swelly battery life lasts up to 60 minutes. With the Fun Extender at ready, simply charge the original battery & keep your kids (happily) at play for even longer. Simply swap out & swim. All battery units are premium grade lithium ion & rechargeable. Fun Mode: Activated! Battery must be handled by adults only. Show more