JAG35, a brand associated with DIY electric bike and powerwall content, sells its own line of lithium battery packs for electric bikes and scooters. The R5 R-Series 36V 13Ah 460Wh Battery, built around NCR18650BD cells, is one of the more established packs in that lineup.
Pricing on this listing varies by variant. The site's base listing shows a regular price of $125.00 discounted to a sale price of $75.00, while other variant options (differing by pack quantity and whether the pack includes an XT60 connector, and whether it's sold as "tested" or "untested") carry different prices, with the lowest starting around $50.00. Some variants, including the untested single- and double-pack options, were shown as sold out at the time of this review, so buyers should check current variant availability directly on the page.
The product shows 7 reviews per the page's review widget, a modest but present review count for this kind of specialty DIY battery pack.
Because this listing includes both "tested" and "untested" pack variants, buyers should pay close attention to which option they're selecting, since untested packs are typically sold at a lower price point specifically because they haven't been individually verified by the seller before shipping.
For DIY eBike and scooter builders comfortable working with raw 18650-based packs, JAG35's R5 offers a reasonably priced option with some real review history, provided buyers choose the variant (tested vs. untested, connector or not) that matches their comfort level. You can view current variant pricing and availability here.
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