On 13/05/2014 08:32, Adrian wrote:
On Tue, 13 May 2014 04:54:43 +0100, Bill Wright wrote:

Given two 12V lead acid gell batteries, both new, both the same type,
but from different sources, how do I balance the charge before fitting
them in a 24V appliance?

Chuck 'em both on the same 12v smart charger until they reach "float"?

But not at the same time.