I thought is was weird too...but one page I was looking at didn't list the base as standard with the S15R. You are correct, though, after further checking,thedoc007 Today, 08:45 PM
Home Depot has just started offering (2) new 48" bulbs that are priced at $24.95 each.
Here are some links:
All the "R" come with a charging base. S10R, S15R, S20R and S30R.
If it doesn't have a R in the name it's the standard version without
Keeppower 2,000 Mah, Efest 2,200 Mah from what I have seen...
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I expect it will be soon - Niwalker has just sent me a revised sample for testing. Not sure of release date or price, but this should be close to theselfbuilt Today, 08:38 PM