The Keeppower 26650 5200mah looks very good, bet they are not cheap! 20s5p 84v 26ah would come in under 10kg. My 20s4p 20ah hard case pack weighs that much and is slightly bigger.
The Keeppower 26650 5200mah looks very good, bet they are not cheap! 20s5p 84v 26ah would come in under 10kg. My 20s4p 20ah hard case pack weighs that much and is slightly bigger.
What appears to be official website:
http://www.keeppower.com.cn/products_detail.php?id=479
Appears to stock them ($13.99 each), Free Shipping on Domestic Orders Over $100:
http://www.illumn.com/26650-keeppower-5200mah-imr26650-high-discharge-flat-top.html
ebay (AUS), 2 for $29.95, free postage:
http://www.ebay.com.au/itm/2-X-26650-Keeppower-5200-mAh-rechargeable-Lithium-ion-batteries-yes-5200mAh-/281353168513