Difference between Ultrafire WF-501B T6 and Ultrafire WF-502B T6

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Review: Ultrafire WF-501B with 5-mode MC-E drop-in

Ultrafire WF-501B with 5-mode MC-E drop-in Reviewer's Overall Rating: ★★★☆☆ [image] Summary: Battery: 1x18650 Switch: Reverse clicky Modes: 5 (H-M-L-S-SOS) LED Type: Cree MC-E M bin Lens: Glass Tailstands: No Price Payed: $20.00 From: DealExtreme Pros: Bright Cheap Mode memory works well Nice Low Cons: Under-driven Dark donut hole in beam Current not well-regulated Whines on medium Host can't handle heat Features / Value: ★★★☆☆ ***Update***…