While looking for a quality and high current (max 15A) 18650 Lithium battery holder, I've found that Keystone offers:
Surface Mount Style with contacts of stainless steel and "gold flash over nickel plate" finish;
"Gold Flash for outstanding solder performance and low contact resistance" (source: Keystone)
Through Hole Style with contacts of stainless steel and "tin nickel plate" finish;
"Tin over Nickel plate for superior soldering." (source: Keystone)
Here an overview from Keystone website.
I am not sure which one to choose:
The pin of the Through Hole Version are about 1mm diameter, while the SMT version has 6x7mm pads. So I wonder if the Through Hole can carry more then 2-3A. I've read in a forum of somebody getting 20-30A, but this is unverified.
The SMT version could be better for my case but it has gold flash finish contacts, which 18650 batteries usually don't. It is advised not to mix gold and tin contacts due to the chemical reaction over time that will deteriorate the electrical connection.
What's your experience or suggestion? Are my worries valid?
The description from Keystone don't help much and there is no mention of Current Rating or other electrical properties in the datasheets.