Sun Joe cordless lawn mowers use different battery systems depending on the model. Some use removable 24V IONMAX batteries, while the MJ401C family uses an integrated 28V battery.
Always confirm the complete mower model before purchasing a replacement battery or charger.
Battery Systems by Model
| Model | Battery | Battery Type |
|---|---|---|
| MJ401C / MJ401C-PRO / MJ401C-XR | 28V lithium-ion | Integrated battery charged through the mower. |
| MJ24C-14 / MJ24C-14-XR | 1 × 24V IONMAX battery | Removable battery. Current configurations include 4.0 Ah and 5.0 Ah versions. |
| 24V-CRLM15 | 1 × 24V IONMAX battery | Removable battery. Current kit includes a 4.0 Ah battery. |
| 24V-X2-17LM | 2 × 24V IONMAX batteries | Removable batteries. Current kit includes 2 × 4.0 Ah batteries. |
How Do I Check My Battery Level?
24V IONMAX Batteries
| LEDs | Charge Level | Status |
|---|---|---|
| 3 LEDs | High charge | Battery is ready for use. |
| 2 LEDs | Charge is decreasing | Recharge when needed. |
| 1 LED | Battery is low/flat | Charge the battery. |
Press the charge-level button on the battery to view the LED indicator.
MJ401C-XR Integrated Battery
| Indicator Lights | Charge Level | Status |
|---|---|---|
| Green + Yellow + Red | More than 60% | Battery has sufficient charge. |
| Yellow + Red | More than 30% | Battery charge is decreasing. |
| Red only | Less than 30% | Battery needs to be charged. |
On the MJ401C-XR, lift the battery gauge cover and press the button to view the built-in battery capacity indicator.
How Long Does the MJ401C-XR Take to Charge?
The MJ401C-XR uses an integrated 28V, 5.0 Ah lithium-ion battery.
The operator's manual lists a maximum charging time of approximately 5.5 hours.
The charger indicator is red while charging and turns green when fully charged.
The MJ401C-XR charger does not automatically switch off when charging is complete. Unplug the charger when the indicator turns green.
Can I Remove the Battery?
MJ24C-14, MJ24C-14-XR, 24V-CRLM15, and 24V-X2-17LM use removable batteries.
The MJ401C family uses an integrated battery that remains inside the mower and is charged through the mower.
Will My Mower Include a Battery + Charger?
| Example | Included | Configuration |
|---|---|---|
| 24V-CRLM15 Kit | 4.0 Ah battery + charger | Kit |
| MJ24C-14 | 24V battery + charger | Kit |
| 24V-X2-17LM | 2 × 4.0 Ah batteries + dual-port charger | Kit |
| 24V-X2-17LM-CT | Battery + charger sold separately | Tool Only |
Check the exact product configuration before purchasing. Models identified as CT or Tool Only may be sold without batteries or a charger.
Which 24V Batteries Work with the 24V-X2-17LM?
The 24V-X2-17LM operator's manual lists the following compatible 24V IONMAX battery options:
- 24VBAT-LTE — 2.0 Ah
- 24VBAT-LT — 2.5 Ah
- 24VBAT — 4.0 Ah
- 24VBAT-XR — 5.0 Ah
This mower uses two 24V batteries.
Can I Use a 24VBAT-XR8?
The 24V-X2-17LM operator's manual does not list 24VBAT-XR8 among its compatible battery options.
Use only the battery models listed for your exact mower in its product information or operator's manual.
Check Your Exact Mower
Before purchasing a battery or charger, confirm your complete model number and check its battery requirements on the Shop Joe Product Manuals page.
Not Sure Which Battery You Need?
If you are unsure which battery or charger is compatible with your cordless lawn mower, contact Shop Joe Customer Support. Have your complete model number available.