Replace a Sealed Lead Acid Battery with a Lithium-ion Battery in the Mower. My mower has a sealed lead acid battery, which has a life of three years. When the battery is new, I could use the mower to cut grass in one charge. Now, I have to charge it twice before I could finish cutting. Original battery is 36 V 10 A, I bought a lithium-ion battery from ebay, which is 36 V 20 A. The old battery in the mower: ![](/upload/album/d5/8b/bd/ba9b597c9369z2MAXMKI.jpg)
![](/upload/album/d5/8b/bd/ba9b597c9491bKlIWm48.jpg)
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The new battery: ![](/upload/album/d5/8b/bd/ba9b597c9464swhi5HPX.jpg)
Take the old battery out, cut the positive wire out from the new battery, strip it: ![](/upload/album/d5/8b/bd/ba9b597c9688rpuaHGq9.jpg)
Crimp it in an insulated male connector with a crimping tool: ![](/upload/album/d5/8b/bd/ba9b597c1275clz5inVV.jpg)
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Cut the negative wire and strip it: ![](/upload/album/d5/8b/bd/ba9b597c9947sipbXwfy.jpg)
Crimp it in the insulated male connector, connect two male connectors with the the circuit: ![](/upload/album/d5/8b/bd/ba9b597c0147vhXxdXvB.jpg)
Since the new battery is much smaller than the old one, I have to put some bubble wrap (under a plastic box for Tofu) to fill the empty room: ![](/upload/album/d5/8b/bd/ba9b597c0294ShTR6pw0.jpg)
Put the circuit cover on the mower: ![](/upload/album/d5/8b/bd/ba9b597c2161zu9tUPNx.jpg)
It works, the motor runs. ![](/upload/album/d5/8b/bd/ba9b597c2191N7652zbs.jpg)
Put the battery cover back: ![](/upload/album/d5/8b/bd/ba9b597c2240JOhQUR4D.jpg)
It is much lighter. The original battery is 29 lbs. The new one is probably less than 5 lbs. The life of the new battery should be much longer than 3 years. When the new lithium-ion battery is installed, a new charger for the lithium-ion battery must be used, never use the lead acid battery charger to charge the lithium-ion battery! ![](/upload/album/dc/68/d9/c1bf7f3d2531buYkkGtC.jpg)
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