Mobility Scooter Battery Guide
A plain-language guide to choosing a lithium battery for your mobility scooter or power chair. Take your time — and if you're helping someone else, this is for you too.
1. How to pick a replacement battery by size
Start with the label on your current battery. Write down the voltage (usually 12V) and the Ah (amp-hours). Then measure the battery tray: length, width and height.
- U1 size (about 7.8 x 5.2 x 6.8 in) — the common 12V 33-35Ah sealed lead-acid battery in mid-size scooters and power chairs. Choose the MobilityBatteryUSA U1-30 or, for more range, the MobilityBatteryUSA U1-60.
- Small 12V 7Ah-class travel batteries — choose the MobilityBatteryUSA 7.
- 12V 12Ah-class travel scooter trays — choose the MobilityBatteryUSA 11 Tray Pack.
- 12V 22Ah-class trays — choose the MobilityBatteryUSA 22 Tray Pack.
- Heavy-duty Group 24 size — choose the MobilityBatteryUSA 100 Heavy-Duty. It's 9.2 in tall, so check your tray height.
| Pack | Voltage / Ah | Size (L x W x H) | Weight | Price |
|---|---|---|---|---|
| MobilityBatteryUSA 7 | 12V 6.4Ah | 5.94 x 2.53 x 3.83 in | 2 lb | $59 · $109 pair |
| MobilityBatteryUSA 11 Tray Pack | 12V 11.1Ah | 5.94 x 2.53 x 3.83 in | 2.87 lb | $159 · $309 pair |
| MobilityBatteryUSA 22 Tray Pack | 12V 22.2Ah | 4.53 x 3.52 x 6.5 in | 5.51 lb | $329 · $649 pair |
| MobilityBatteryUSA U1-30 | 12V 30Ah | 7.8 x 5.2 x 6.8 in | 12.5 lb | $179 · $339 pair |
| MobilityBatteryUSA U1-60 | 12V 60Ah | 7.8 x 5.2 x 6.8 in | 15 lb | $329 · $639 pair |
| MobilityBatteryUSA 24V U1 | 25.6V 30Ah | 7.8 x 5.2 x 6.8 in | 15 lb | $299 |
| MobilityBatteryUSA 100 Heavy-Duty | 12.8V 100Ah | 10.23 x 6.6 x 9.2 in | 23.1 lb | $499 · $949 pair |
| MobilityBatteryUSA 24V Travel | 25.6V 11.1Ah | 4.53 x 3.52 x 6.5 in | 5.5 lb | $429 |
2. Lithium (LiFePO4) vs sealed lead-acid
- Weight: our U1-30 weighs 12.5 lb, compared with roughly 22-25 lb for a typical U1 sealed lead-acid battery.
- Usable capacity: lithium delivers most of its rated capacity, while lead-acid is usually best kept above half charge.
- Cycle life: LiFePO4 typically lasts thousands of charge cycles, while sealed lead-acid typically lasts a few hundred. Real results depend on use and care.
- Built-in BMS: every pack protects itself against over-charging, over-discharging and short circuits.
- Warranty: every pack comes with a 3-year warranty.
3. 12V pairs vs a single 24V pack
Most scooters run on two 12V batteries connected in series to make 24V. Our pairs replace both batteries, connected the same way your old ones were. The MobilityBatteryUSA 24V U1 is one 24V pack for setups with room for a single battery.
4. Charging
- Use a lithium (LiFePO4) compatible charger. Don't use a lead-acid-only charger.
- Our 12V 4A Smart Charger ($49) and 24V 2A Smart Charger ($59) are matched to your pack's voltage.
- Charge indoors, in a dry place.
- For storage, keep the pack partly charged in a cool, dry spot and top it up every few months.
5. Travel tips
Many airlines use a 300 Wh guideline for lithium mobility batteries. Our MobilityBatteryUSA 24V Travel is 284 Wh. Rules vary, so always check with your airline before you fly.
6. Compatible scooters & chairs
- Travel and folding scooters: small 12V 7-12Ah packs or the 24V Travel pack.
- Mid-size 3- and 4-wheel scooters: a pair of U1 packs.
- Heavy-duty 4-wheel scooters: U1-60 pairs or a Group 24 size pack.
- Power chairs: U1 pairs, the 24V U1, or the heavy-duty pack.
Not sure? Use Find my fit or write to support@mobilitybatteryusa.com.
This is general guidance. Always confirm your battery size and voltage.
7. Why MobilityBatteryUSA
Our packs are made in the USA by an ISO 9001-certified manufacturer. We're based in and ship FedEx Ground from Rexburg, ID, with a 3-year warranty and 30-day returns on unused items.