ERGO M575S or MX ERGO S: compare the trackball base and power
Compare current Logitech thumb trackballs by battery system, receiver, controls and listed dimensions, separating manufacturer facts from conceptual operating and charging illustrations.
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Choose the power and control arrangement you need
Choose ERGO M575S when a thumb-operated trackball with one replaceable AA battery and its five-button arrangement meets the requirement. Consider MX ERGO S when its rechargeable system and additional programmable controls are useful. Both are trackballs: the ball controls the pointer while the base can stay in place. This is a practical difference from moving an ordinary mouse across the desk, not a promise of greater comfort or a medical benefit.
The opening body illustration contrasts a generic stationary thumb-trackball base with an ordinary mouse. It does not reproduce the M575S or MX ERGO S, demonstrate hand reach, or establish current receiver and software features. The comparison below uses the exact named models' manufacturer specifications. A trackball still needs space for its body and your hand, even though pointer motion does not require sliding the base around the desk.
Compare the listed bodies and controls
Check the usable space and the position of the thumb-operated ball before choosing. The two bodies have different measurements, and the MX ERGO S weight is reported separately with and without its metal plate. Comparing its bare-body figure with an assembled setup would hide an important part of the reference. These are manufacturer specifications rather than measurements or handling tests performed here.
Scroll the table sideways to view all model columns.
| Field | ERGO M575S | MX ERGO S |
|---|---|---|
| Dimensions | 134 × 100 × 48 mm | 132.5 × 99.8 × 51.4 mm |
| Listed weight | 145 g | 164 g without plate; 259 g with plate |
| Buttons | 5; 3 customizable | 8; 6 customizable |
| Power | One AA battery | USB-C rechargeable |
| Wireless routes | Logi Bolt or Bluetooth Low Energy | Logi Bolt or Bluetooth Low Energy |
| Manufacturer battery claim | Up to 18 months | Up to 120 days |
Keep replaceable cells and charging accessories distinct
M575S uses one AA battery. The generated maintenance illustration separates a generic battery compartment, a removable cover and a cell from a rechargeable device and cable. It does not show either model's actual battery bay, polarity markings, charging-port position or disassembly procedure. Follow the actual manufacturer instructions for the exact device rather than copying the illustration's arrangement. Retain a suitable replacement cell in your maintenance plan.
MX ERGO S has a rechargeable battery and USB-C charging. Its product information states that the charging cable is not included, so confirm what is supplied in the actual seller bundle before adding an assumed accessory to the purchase. A suitable existing cable and connection may affect your required equipment, but this guide does not approve every cable or power arrangement.
Battery claims do not establish a cost winner
The manufacturer advertises up to 18 months for M575S and up to 120 days for MX ERGO S. These claims concern different power systems and stated conditions. They are not matched endurance measurements and should not be converted into an efficiency ratio or a guaranteed replacement schedule. Actual use and settings can change the operating interval.
An ownership-cost comparison would additionally need current purchase prices, appropriate replacement-cell costs, actual included accessories and a defensible usage period. Those complete US baskets have not been verified here. The useful decision is the maintenance routine you can support: keeping the specified replacement battery available or maintaining the supported charging arrangement.
Verify the current receiver and software family
Both current product references list Logi Bolt and Bluetooth Low Energy. An older Unifying receiver is not a Bolt replacement. A receiver from an older Logitech trackball must not be assumed compatible with a newer one simply because the brand or general body shape is familiar. Use the exact current model's documented pairing route and check the actual receiver identifier; neither generated illustration authenticates a receiver or demonstrates a successful pairing.
Customization is a separate question from basic pointer operation. Confirm the operating system and supported Logi Options+ functions if the additional programmable controls are the reason for choosing MX ERGO S. Before ordering, retain the exact model, power arrangement, required cable, receiver choice and seller's return conditions together. No independent grip, noise, medical, latency or battery test is claimed. If stationary-base movement is the goal, both named products address that control method; the remaining choice depends on the specific power and controls you require.
