29.4v 2amp charger or ideas how to charge with out one

[angellonewolf]

I have a 36v Li-Ion cordless strimmer that I found, but no charger. I opened the battery pack and soldered a jumper wire so that I can charge it in two "halves" from an 18v power tool charger.


Charge each cell separately.
That could be done, using jumper wires from something like this:

Pardon our interruption...

but with 7 or maybe 8 cells that would be tedious.
The correct chargers are not expensive, this one is only 10 quid:

29.4V 2A Power Supply Charger for 24V 25.2V 25.9V 7S Li-ion Battery E-Bike Part 6217944162273 | eBay

Find many great new & used options and get the best deals for 29.4V 2A Power Supply Charger for 24V 25.2V 25.9V 7S Li-ion Battery E-Bike Part at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

ive ordered this as a 10er is not that bad for a chance

 

[Nomad]

Are there any markings on the bike or battery to show what the voltages should be? I have a couple of electric bikes :
36volt, fully charged is 41.5v, cuts out when it falls to 31.5v
24volt - same idea but I don't remember the actual voltages, fully charged is near 30? fully drained is just under 20?
The chargers are simple 2 wire connections not like remote control toys with 5+ connections on the charger.

 

[Stupoty]

Are there any markings on the bike or battery to show what the voltages should be? I have a couple of electric bikes :
36volt, fully charged is 41.5v, cuts out when it falls to 31.5v
24volt - same idea but I don't remember the actual voltages, fully charged is near 30? fully drained is just under 20?
The chargers are simple 2 wire connections not like remote control toys with 5+ connections on the charger.

A battery I have that is labeled 37v is a 10x4 arrangement of 18650 type cells , so 10 series wired groups of 4x cells in parallel , 37v is the nominal or midway voltage. Flat is 30 and full charge is 42v (approximately , mileage may vary and all that )

(Individual cell voltages 3v flat, 4.2v full)

The battery "should" have some form of balance and protection circuitry in it.

Stu

 

[angellonewolf]

Are there any markings on the bike or battery to show what the voltages should be? I have a couple of electric bikes :
36volt, fully charged is 41.5v, cuts out when it falls to 31.5v
24volt - same idea but I don't remember the actual voltages, fully charged is near 30? fully drained is just under 20?
The chargers are simple 2 wire connections not like remote control toys with 5+ connections on the charger.

A battery I have that is labeled 37v is a 10x4 arrangement of 18650 type cells , so 10 series wired groups of 4x cells in parallel , 37v is the nominal or midway voltage. Flat is 30 and full charge is 42v (approximately , mileage may vary and all that )

(Individual cell voltages 3v flat, 4.2v full)

The battery "should" have some form of balance and protection circuitry in it.

Stu

all i know on the bottem of the scooter it says 29.4v 2amp and that is the same as the chargers online on there web site

 

[angellonewolf]

update for all the cheap charger that was post by @eddie49

has turned up and charged the scooter so its up and running for the small cost of £20 quid the kids already had that moneys worth out of it so keep it a few months then sell on to recoupe the £20 and the kids had loads a fun for a bit of work