Rechargeable Power Supplies & Battery Life: A Buyer’s Guide Rechargeable power supplies can offer superior noise performance and great convenience. A key concern for anyone considering this type of power supply is battery life… and on this issue, unfortunately, there’s a lot of misinformation and marketing nonsense out there. I’ve recently been down a rabbit hole trying to understand the complexities of rechargeable battery capacity so I thought I’d share some learnings.  I don’t c