I have a few of these left over from a solar project...
http://www.ebay.co.uk/itm/Super-Rechargeable-Protable-Li-ion-Battery-DC-12V-6800mAh-Lithium-ion-EU-Plug-/351353498255?pt=LH_DefaultDomain_3&hash=item51ce4cea8f
Is there any reason why I shouldnt buy a few more and put them in serial and parrallel (2S4P, for example) to give me a battery for my bike?
It seems that these 12v units have a maximum current of 1-2A. That's my main concern. Presumably, if I have enough of these, they will produce enough current to power my 250W motor at 24V.
I would charge each unit separately.
Should I have any concerns about doing this? Given that I already have a few of these batteries, it would save me a few quid to make up a battery this way. I"m not experienced enough to make a 24V Lithium battery myself from scratch and would like to avoid the huge cost of a dedicated ebike battery.
http://www.ebay.co.uk/itm/Super-Rechargeable-Protable-Li-ion-Battery-DC-12V-6800mAh-Lithium-ion-EU-Plug-/351353498255?pt=LH_DefaultDomain_3&hash=item51ce4cea8f
Is there any reason why I shouldnt buy a few more and put them in serial and parrallel (2S4P, for example) to give me a battery for my bike?
It seems that these 12v units have a maximum current of 1-2A. That's my main concern. Presumably, if I have enough of these, they will produce enough current to power my 250W motor at 24V.
I would charge each unit separately.
Should I have any concerns about doing this? Given that I already have a few of these batteries, it would save me a few quid to make up a battery this way. I"m not experienced enough to make a 24V Lithium battery myself from scratch and would like to avoid the huge cost of a dedicated ebike battery.