Replicant

Since many of the devices Replicant support are now old, we might advise buyers to:

• Buy from Replicant friendly shops
• Advises them on issues when not buying from such shops (Like batteries issues). discontinued official batteries:
  • Samsung Galaxy S (#1413, #1425)
  • Galaxy Note (N7000) (#1431, #1437)

The (duplicated) bugreports mentioned a way to check if new batteries can still be bought easily: http://www.samsung.com/us/mobile/cell-phones-accessories/batteries-battery-doors and mentioned the risk of third party batteries with http://www.howtogeek.com/172680/danger-why-you-shouldnt-buy-cheap-third-party-batteries-for-laptops-or-smartphones/

However batteries, even if stored properly have a limited life expectancy. As a result, at some point official batteries will be useless since they all will be broken. Only unofficial remakes will be possible at that point.