Metz60CT-4 versus Quantum Model T Qflash???

[Ian Gordon Bilson]

The dryfit cells for the Metz are amazingly durable -mine are dated '89 and '94 and still hold a charge just fine. The dryfit is a sealed lead/acid design with a gelled electrolite,and the only way to kill one is to leave it sitting around in a discharged state.
FWIW : The manual states "Illumination angle :48 degrees vert/65 horiz,and with w/a diffusor 65 x65.
The 60 ct4 is an excellent flash -highly recommended.

[ac12]

As I understand, all SLA batteries will age.
That you got over 10 years use from it is GREAT.