Question 1

What replacement foil and cutter does it use? It says 52b but that obviously doesn't match.

Accepted Answer

All the answers from Feb 2020 are now out of date. As of 8/23/2020, just search anywhere for "Braun 35B" and it will come up. 
Of course a company like Braun would never put out an orphaned product. I'm guessing there was a short-term supply problem back then?
Watch out when shopping... there is more than one style cutter head for the series 5 Shavers. You need the type number which is only number that is unique to your shaver.
I finally found it on my shaver under the cutter head. The front page of the manual shows Model 5762 for the one I got. Then manual also lists the 53B cutter head assembly.
So keep your manual! You will also need it to reset the cutter replacement indicator.
Amazon is only showing one. It is $31.72 but there is $11.26 shipping from the UK. Walmart has it on their website for $29.90 with free shipping.

Question 2

What is the difference between these three model shavers which one shaves the best??

Accepted Answer

All of our shavers will provide a close and comfortable shave. However, your experience will vary depending on what model you have. To know the difference between our shavers, and give you a product recommendation, give us a call at 800-272-8611. - The Braun Team

Question 3

When the battery is fully discharged or damaged can you still use it by just plugged it in ?

Accepted Answer

No, (for safety reasons?) the shaver is designed not to operate while plugged in.

Question 4

Is there any information on replacing the battery?

Accepted Answer

No, because messing with the battery will void the warranty. We do not recommend doing anything to the battery. - The Braun Team

ASIN	B0812F2QRD
ASIN	B0812F2QRD
Additional Features	Easy Clean
Batteries	1 Lithium Ion batteries required. (included)
Battery Average Life	3 weeks
Battery Description	Rechargeable
Best Sellers Rank	#167,438 in Health ( See Top 100 in Health ) #381 in Men's Foil Shavers
Blade Material	Stainless Steel
Brand Name	Braun
Color	Silver
Customer Reviews	4.3 4.3 out of 5 stars (9,926)
Customer reviews	4.3 4.3 out of 5 stars (9,926)
Global Trade Identification Number	00069055885482
Head Type	Foil
Included Components	Attachment, Cleaning Brush, Shaver, Smart Plug
Item Weight	304 g
Item model number	5020S
Manufacturer	Procter & Gamble
Manufacturer	Procter & Gamble
Manufacturer Part Number	5020S
Model Name	Series 5
Model Number	5020S
Number of Blades	3
Power Source	Battery Powered
Product Dimensions	13.69 x 6.71 x 25.2 cm; 303.91 g
Recommended Uses For Product	Beard
UPC	069055885482
Unit Count	1 Count

Braun Series 5 5020 Electric Razor for Men Foil Shaver with Beard Trimmer, Rechargeable, Wet & Dry with EasyClean, Black, 5 Piece Set

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