Thanks for that , I just got the chair second hand it's 18mth old and mint cond just had 2 new batteries fitted as it wasn't in use for 3 months by previous owner but its very slow max 2mph & thats on smooth flat and makes no diff user weight or up or down hill The shop that fitt batts noted that mechanics are v new look 2.went for miles n batts still got full charge. Any ideas please anyone as I'm gutted if that's it & grateful for any help