The yard is wet and the truck is late, so the fleet supervisor does the only thing left to do: she lays two documents across the hood of the tricycle quoted last week. One is the battery line from the supplier sheet — 12V 65Ah lead-acid, four pieces, a number that reads as adequate for a day of curbside collection. The other is a phone photo of the charger nameplate: 220V, 50Hz. The battery looks fine. The charger matches nothing on the wall behind her.

The charger nameplate, not the battery headline, is the first thing to verify, because a tricycle can meet its range claim and still be impossible to charge where it is parked. Both figures above come from named export models: the Qiangsheng 800W waste collection tricycle for the four 12V 65Ah lead-acid batteries and the 220V 50Hz charger, and Lvbao's 72V/2200W three-wheeled waste collection vehicle for the range, capacity, and charge-time claims below. Neither figure is a category specification you can carry to another supplier, and neither listing by itself settles US suitability — that check is part of what follows.

Read the Charger Nameplate Before the Battery Spec

A charger is an energy converter, not a plug accessory. It takes site AC at whatever voltage and frequency the grid supplies and turns it into the DC profile the pack needs, which is why the input nameplate and the output rating are two separate things to check and two separate ways to be wrong. The Qiangsheng listing pairs four 12V 65Ah lead-acid batteries with a charger rated 220V 50Hz — reasonable for an export market, and not a match for a US receptacle.

Check the input side first because a correctly sized battery cannot rescue a charger the site cannot energize. A 65Ah block stores real energy; if the only charger in the crate wants 220V at 50Hz, that energy stays locked in the pack until someone solves the supply. That makes charger input a go/no-go gate rather than a line item to reconcile after the paperwork is signed.

Match Battery Chemistry to the Charging Hardware

Lvbao's specification lists both lead-acid and lithium-ion configurations for the same vehicle, so chemistry is a decision made before it becomes a spec. The two families do not share a charge profile. The reason is that charge termination — the point at which the charger decides the pack is full and stops pushing current — is tied to cell chemistry and cell count, so a lead-acid algorithm run into a lithium pack is not a slower charge but a different event with a different ending.

Charger and pack therefore have to be documented as a set. Worksman's lithium storage and charging instructions state the rule plainly: charge only with the charger the manufacturer supplied with that battery, never with a generic charger, power supply, or other charging device. That document covers Worksman's own lithium packs, so treat it as the shape of the question to ask your supplier rather than an industry-wide rule.

Can the Stated Charge Time Fit Your Shift?

Lvbao quotes 6-8 hours for a standard charge on the included charger, and 60-100km of range depending on whether the pack is 100Ah or 150Ah. Those numbers answer different questions. Range tells you whether the route fits; charge time tells you whether the vehicle can be back on that route tomorrow.

Charging time is a throughput limit, because a tricycle that sits on a charger for six to eight hours is unavailable for work for six to eight hours no matter how far it can drive. Capacity is stored energy; charge time is how fast that energy goes back in, bounded by what the charger can push. The range claim and the charge-time claim have to be read against the same shift schedule, not admired separately.

Suppose a two-shift yard runs collection from early morning to late afternoon and has a seven-hour overnight window at the receptacle. Don't let the brochure do your arithmetic for you: seven hours of window against a six-to-eight-hour charge is a coin flip, not a plan. If the supplier documents opportunity charging or a spare-pack swap, the arithmetic changes; if it does not, the buyer holds the risk.

The dependency runs both ways. A charger with lower output lengthens the window, and a larger pack lengthens it further. Ask what the charger in the crate is rated to deliver, and what the charge time becomes when the pack is upgraded, since the published figure belongs to one configuration.

Check Charger Input Against the Actual Site

Battery voltage and charger input voltage sit on opposite sides of the same box. The pack side is DC: four 12V 65Ah blocks in the Qiangsheng example. The input side is AC, and that is where your facility enters the picture, because the charger's whole job is converting what the wall provides into what the pack accepts.

'It fits the socket' is the most common false pass in this check. A plug adapter changes pins; it does not change frequency or the input rating the charger was built for. The fix has to come from the supplier — a charger variant rated for your supply, or a documented site solution — and not from the adapter drawer in the maintenance shop.

Three items to photograph before the unit ships: the charger label with input voltage and frequency legible, the receptacle the yard will actually use, and the supply information from the facility electrician or utility. If any one of the three is missing, the charger is an open item on the purchase order rather than a question that resolves itself at delivery.

Verify the Charger Belongs to That Battery Pack

Connectors can be identical across packs that want completely different charge termination. Because the charger's output profile is built around a specific cell chemistry and pack configuration, a matching plug and a matching voltage label prove nothing about whether the charger stops at the right point. The match has to be documented at part-number level rather than inferred from photographs.

Ask for the charger model, the pack part number, and a written statement that they ship as a matched set for the vehicle on your quote. The Worksman instructions go further in a direction that matters to maintenance readers: never open a lithium-ion battery pack, on the grounds that there are no serviceable parts inside.

That last point governs how you verify. This is a paperwork check, not a bench test, and nobody at the yard should be cracking a case to read a label inside it. If the supplier cannot produce the pairing on paper, the honest answer is not that it will be sorted out at delivery.

Confirm What the Manual Requires During Charging

The Worksman instructions attach two conditions to the charging process itself: monitor the battery at all times while it charges, and disconnect the charger from its power source and unplug the battery when the full-charge indication comes on. Both are written for that named lithium battery document; obtain the equivalent written procedure for the exact model you are buying.

Then hold those conditions against the yard's real staffing. Charging is an attended operation in the cited document, which means somebody has to be present — an unattended overnight charge in a locked compound does not meet that description. If no one can monitor a charge, the question goes to the supplier: what does their written procedure for this model require, and what do they document for a site staffed like yours? Do not design a charging room around a guess.

The full-charge step is the easiest condition to assign to a person by name. Find out who pulls the plug at the indication, and write that name into the site procedure before the unit enters service.

Put the Checks in a Pre-Purchase Sequence

Start by fixing the exact model and version on the quote, because every later check hangs off that label. Photograph the charger nameplate and the battery label on the quoted unit. Compare charger input against the site's voltage, frequency, and receptacle type. Compare battery chemistry and pack part number against charger part number. Set the stated charge time beside the yard's real between-shift window. Obtain the written charging instructions and name who can attend a charge. Then attach all of it to the purchase order.

Each step has its own pass condition, and the conditions are not interchangeable. A photograph counts only if the numbers are legible; the supply comparison clears only when voltage, frequency, and plug are all addressed; the pack match holds only if both part numbers appear in writing. A verbal assurance that these units ship all the time proves nothing.

One failure holds the order. If input, pack match, or attendance fails, the rest of the sequence stops mattering, because the unit either cannot be energized at your site as delivered or cannot be charged the way its own instructions describe. The whole check comes down to whether the charger, the pack, and the wall were specified as one system or as three separate purchases that happened to share a crate.

Know Which Claims Stop at the Model

The 6-8 hour charge time, 60-100km range, 100-150Ah capacity, and 72V/2200W context belong to Lvbao's named export vehicle. The four 12V 65Ah lead-acid batteries and the 220V 50Hz charger belong to the Qiangsheng 800W model. Neither set transfers to another supplier's tricycle, and the qualifications attached to those listings are not decorative: no US road approval is established for the Lvbao unit, and the Qiangsheng charger is not US outlet-compatible as listed.

That is the trade-off a spec sheet hides. A number can be true for the cited unit and still be the wrong requirement for your yard — 100km of range is generous until the charger cannot be plugged in, and 65Ah per block is irrelevant if the pack chemistry does not match the charger in the crate. Neither listing tells you which of those facts applies to the unit on your dock, which is why the verification has to be documentary and unit-specific.

Before you sign, require one thing: a photo of the charger nameplate on the exact unit that will ship, with the input voltage and frequency legible. Everything else in this sequence can be repaired later with paperwork and a phone call. That one cannot, because no battery capacity claim fixes a charger your yard is unable to energize.