Will Freeman (Linktree for email, Hive, etc.) no Twitter: "I don't mean to overexcite you... but I finally settled on my second favourite battery format ever. 'Sony Gumstick' batteries. Lovely offbrand model
Trade 8947 Hybrid Nickel Metal 1450 mAh 1.2 V Rechargeable Battery - Batteries: Amazon.de: Electronics & Photo